Maths-
General
Easy

Question

A student says that the expansion of the expression left parenthesis negative 4 y plus z right parenthesis to the power of 7 has seven terms. Describe and correct the error the student may have made ?

hintHint:

The expansion of the expression left parenthesis x plus y right parenthesis to the power of n would have n+1 terms. The binomial expansion is
left parenthesis x plus y right parenthesis to the power of n equals sum from k equals 0 to n of   n C subscript k x to the power of n minus k end exponent y to the power of k comma text  here  end text n greater or equal than 0 .
We are asked to describe and correct the error the student has made while expanding left parenthesis negative 4 y plus z right parenthesis to the power of 7 and getting only seven terms.

The correct answer is: 7 terms.


     Step 1 of 2:
    The given expression is left parenthesis negative 4 y plus z right parenthesis to the power of 7 . Here, the values of x equals negative 4 y straight & y equals z . The value of n=7
    Step 2 of 2:
    Substitute the values in the binomial expansion to get the terms:

    table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell left parenthesis negative 4 y plus z right parenthesis to the power of 7 equals 7 C subscript 0 left parenthesis negative 4 y right parenthesis to the power of 7 plus 7 C subscript 1 left parenthesis negative 4 y right parenthesis to the power of 6 left parenthesis z right parenthesis plus 7 C subscript 2 left parenthesis negative 4 y right parenthesis to the power of 5 left parenthesis z right parenthesis squared plus 7 C subscript 3 left parenthesis negative 4 y right parenthesis to the power of 4 left parenthesis z right parenthesis cubed plus end cell row cell 7 C subscript 4 left parenthesis negative 4 y right parenthesis cubed left parenthesis z right parenthesis to the power of 4 plus 7 C subscript 5 left parenthesis negative 4 y right parenthesis squared left parenthesis z right parenthesis to the power of 5 plus 7 C subscript 6 left parenthesis negative 4 y right parenthesis left parenthesis z right parenthesis to the power of 6 plus 7 C subscript 7 left parenthesis z right parenthesis to the power of 7 end cell row cell equals 1 open parentheses negative 16384 y to the power of 7 close parentheses plus 7 open parentheses 4096 y to the power of 6 close parentheses left parenthesis z right parenthesis plus 21 open parentheses negative 1024 y to the power of 5 close parentheses left parenthesis z right parenthesis squared plus 35 open parentheses 256 y to the power of 4 close parentheses left parenthesis z right parenthesis cubed plus end cell row cell 35 open parentheses negative 64 y cubed close parentheses left parenthesis z right parenthesis to the power of 4 plus 21 open parentheses 16 y squared close parentheses left parenthesis z right parenthesis to the power of 5 plus 7 left parenthesis negative 4 y right parenthesis left parenthesis z right parenthesis to the power of 6 plus z to the power of 7 end cell row cell equals negative 16384 y to the power of 7 plus 28672 y to the power of 6 z minus 21504 y to the power of 5 z squared plus 8960 y to the power of 4 z cubed minus 2240 y cubed z to the power of 4 plus 336 y squared z to the power of 5 minus 28 y z to the power of 6 plus z to the power of 7 end cell end table
    Thus, we get 8 terms in the expansion. The student may have considered n=6 to get an expansion of 7 terms.

    The answer can be found the Pascal’s triangle as well. The expansion of an expression left parenthesis x plus y right parenthesis to the power of n has n+ 1 term.

    Related Questions to study

    General
    Maths-

    Expand the expression (2x - 1)4 .what is the sum of the coefficients?

    The answer can be also found using the Pascal’s triangle. For an expression (x + y)n , we would consider the (n+1)th row.

    Expand the expression (2x - 1)4 .what is the sum of the coefficients?

    Maths-General

    The answer can be also found using the Pascal’s triangle. For an expression (x + y)n , we would consider the (n+1)th row.

    General
    Maths-

    Use Pascal’s triangle and the binomial theorem to expand (x + 1)4 . Justify your work.

    We can use both the binomial theorem and the Pascal’s triangle to get the expansion of any expression.

    Use Pascal’s triangle and the binomial theorem to expand (x + 1)4 . Justify your work.

    Maths-General

    We can use both the binomial theorem and the Pascal’s triangle to get the expansion of any expression.

    General
    Maths-

    Emma factored open parentheses 625 g to the power of 16 minus 25 h to the power of 4 close parentheses Describe and correct the error Emma made in factoring the polynomial.

    It is important to recall the law of exponents while to expand polynomial expressions.

    Emma factored open parentheses 625 g to the power of 16 minus 25 h to the power of 4 close parentheses Describe and correct the error Emma made in factoring the polynomial.

    Maths-General

    It is important to recall the law of exponents while to expand polynomial expressions.

    parallel
    General
    Maths-

    Expand left parenthesis 3 x plus 4 y right parenthesis cubed using binomial theorem.

    The answer can be found using the Pascal’s triangle. For left parenthesis x plus y right parenthesis to the power of n , we would consider the (n+1)th row as the coefficients.

    Expand left parenthesis 3 x plus 4 y right parenthesis cubed using binomial theorem.

    Maths-General

    The answer can be found using the Pascal’s triangle. For left parenthesis x plus y right parenthesis to the power of n , we would consider the (n+1)th row as the coefficients.

    General
    Maths-

    Expand left parenthesis 3 x plus 4 y right parenthesis cubed using Pascal’s triangle.

    The answer can be found using the binomial theorem left parenthesis x plus y right parenthesis to the power of n equals sum from k equals 0 to n of   n C subscript k x to the power of n minus k end exponent y to the power of k text  where  end text n greater or equal than 0

    Expand left parenthesis 3 x plus 4 y right parenthesis cubed using Pascal’s triangle.

    Maths-General

    The answer can be found using the binomial theorem left parenthesis x plus y right parenthesis to the power of n equals sum from k equals 0 to n of   n C subscript k x to the power of n minus k end exponent y to the power of k text  where  end text n greater or equal than 0

    General
    Maths-

    Use binomial theorem to expand expression (x + y)7 .

    The answer can be found using the Pascal’s triangle. For an expression (x + y)n , we would have n + 1 term.

    Use binomial theorem to expand expression (x + y)7 .

    Maths-General

    The answer can be found using the Pascal’s triangle. For an expression (x + y)n , we would have n + 1 term.

    parallel
    General
    Maths-

    Use binomial theorem to expand expression (d - 1)4

    The answer can be found using the Pascal’s triangle. For an expression left parenthesis x plus y right parenthesis to the power of n , we would have n+ 1 term.

    Use binomial theorem to expand expression (d - 1)4

    Maths-General

    The answer can be found using the Pascal’s triangle. For an expression left parenthesis x plus y right parenthesis to the power of n , we would have n+ 1 term.

    General
    Maths-

    Use Pascal triangle to expand the expression (a - b)6 .

    The answer can be found using the binomial expansion of left parenthesis x plus y right parenthesis to the power of n equals sum from k equals 0 to n of   n C subscript k x to the power of n minus k end exponent y to the power of k text  where  end text n greater or equal than 0

    Use Pascal triangle to expand the expression (a - b)6 .

    Maths-General

    The answer can be found using the binomial expansion of left parenthesis x plus y right parenthesis to the power of n equals sum from k equals 0 to n of   n C subscript k x to the power of n minus k end exponent y to the power of k text  where  end text n greater or equal than 0

    General
    Maths-

    Use Pascal’s triangle to expand the expression (x + 1)5

    The answer can be found using the binomial expansion of left parenthesis x plus y right parenthesis to the power of n equals sum from k equals 0 to n of   n C subscript k x to the power of n minus k end exponent y to the power of k text  where  end text n greater or equal than 0

    Use Pascal’s triangle to expand the expression (x + 1)5

    Maths-General

    The answer can be found using the binomial expansion of left parenthesis x plus y right parenthesis to the power of n equals sum from k equals 0 to n of   n C subscript k x to the power of n minus k end exponent y to the power of k text  where  end text n greater or equal than 0

    parallel
    General
    Maths-

    How many terms will there be in the expansion of the expressionleft parenthesis x plus 3 right parenthesis to the power of n . Explain how you know?

    How many terms will there be in the expansion of the expressionleft parenthesis x plus 3 right parenthesis to the power of n . Explain how you know?

    Maths-General
    General
    Maths-

    Find the third term of the binomial expansion left parenthesis a minus 3 right parenthesis to the power of 6

    The expansion of (x + y)n has n+1 terms while expanding. The answer can be found using the Pascal’s triangle or binomial expansion.

    Find the third term of the binomial expansion left parenthesis a minus 3 right parenthesis to the power of 6

    Maths-General

    The expansion of (x + y)n has n+1 terms while expanding. The answer can be found using the Pascal’s triangle or binomial expansion.

    General
    Chemistry-

    Factor open parentheses x cubed minus 125 y to the power of 6 close parentheses in the form left parenthesis x minus a right parenthesis open parentheses x squared plus b x plus c close parentheses . Then find the value of a,b and c.

    Factor open parentheses x cubed minus 125 y to the power of 6 close parentheses in the form left parenthesis x minus a right parenthesis open parentheses x squared plus b x plus c close parentheses . Then find the value of a,b and c.

    Chemistry-General
    parallel
    General
    Maths-

    Find the fifth term of the binomial expansion left parenthesis x plus y right parenthesis to the power of 5

    The expansion of left parenthesis x plus y right parenthesis to the power of n has n+1 terms while expanding. The answer can be found using the Pascal’s triangle or binomial expansion.

    Find the fifth term of the binomial expansion left parenthesis x plus y right parenthesis to the power of 5

    Maths-General

    The expansion of left parenthesis x plus y right parenthesis to the power of n has n+1 terms while expanding. The answer can be found using the Pascal’s triangle or binomial expansion.

    General
    Maths-

    The sum of the coefficients in the expansion of the expression left parenthesis a plus b right parenthesis to the power of n is 64. Use Pascal’s triangle to find the value of n.

    Using Pascal's Triangle, where n can be any positive integer as x and y are real numbers, one can determine the binomial coefficients of the terms of the binomial formula (x + y)n. Pascal Triangle is a type of number pattern that appears as a triangular arrangement and is represented by triangles. It starts with '1' at the top and continues with '1' on the triangle's two sides. Each new number in the Pascal triangle has equal values to the sum of the two integers above and below. The probability conditions in which this triangle is utilized vary. Every row represents this table's coefficient of expansion of (x + y)n. Zero row n = 0, (x + y)0

    The sum of the coefficients in the expansion of the expression left parenthesis a plus b right parenthesis to the power of n is 64. Use Pascal’s triangle to find the value of n.

    Maths-General

    Using Pascal's Triangle, where n can be any positive integer as x and y are real numbers, one can determine the binomial coefficients of the terms of the binomial formula (x + y)n. Pascal Triangle is a type of number pattern that appears as a triangular arrangement and is represented by triangles. It starts with '1' at the top and continues with '1' on the triangle's two sides. Each new number in the Pascal triangle has equal values to the sum of the two integers above and below. The probability conditions in which this triangle is utilized vary. Every row represents this table's coefficient of expansion of (x + y)n. Zero row n = 0, (x + y)0

    General
    Maths-

    A student says that the expansion of the expression left parenthesis negative 4 y plus z right parenthesis to the power of 7has seven terms. Describe and correct
    the error the student may have made ?

    A student says that the expansion of the expression left parenthesis negative 4 y plus z right parenthesis to the power of 7has seven terms. Describe and correct
    the error the student may have made ?

    Maths-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.