Maths-
General
Easy

Question

If the curves fraction numerator x to the power of 2 end exponent over denominator a to the power of 2 end exponent end fraction plus fraction numerator y to the power of 2 end exponent over denominator 12 end fraction equals 1 blankand y to the power of 3 end exponent equals 8 x blankintersect at right angle then the value of a to the power of 2 end exponentis equal to

  1. 16  
  2. 12  
  3. 8  
  4. 4  

The correct answer is: 4


    Given curves are fraction numerator x to the power of 2 end exponent over denominator a to the power of 2 end exponent end fraction plus fraction numerator y to the power of 2 end exponent over denominator 12 end fraction equals 1
    rightwards double arrow blank fraction numerator 2 x over denominator a to the power of 2 end exponent end fraction plus fraction numerator 2 y over denominator 12 end fraction bullet fraction numerator d y over denominator d x end fraction equals 0

    rightwards double arrow blank fraction numerator d y over denominator d x end fraction equals negative fraction numerator 12 x over denominator a to the power of 2 end exponent y end fraction equals m subscript 1 end subscript (say)

    And y to the power of 3 end exponent equals 8 x rightwards double arrow 3 y to the power of 2 end exponent fraction numerator d y over denominator d x end fraction equals 8

    rightwards double arrow blank fraction numerator d y over denominator d x end fraction equals fraction numerator 8 over denominator 3 y to the power of 2 end exponent end fraction equals m subscript 2 end subscript (say)

    For theta equals fraction numerator pi over denominator 2 end fraction comma 1 plus m subscript 1 end subscript m subscript 2 end subscript equals 0

    rightwards double arrow blank 1 plus open parentheses fraction numerator negative 12 x over denominator a to the power of 2 end exponent y end fraction close parentheses open parentheses fraction numerator 8 over denominator 3 y to the power of 2 end exponent end fraction close parentheses equals 0

    rightwards double arrow blank 3 a to the power of 2 end exponent open parentheses 8 x close parentheses minus 96 x equals 0

    rightwards double arrow blank a to the power of 2 end exponent equals 4

    Related Questions to study

    General
    Maths-

    The function f open parentheses x close parentheses equals cos invisible function application left parenthesis pi divided by x right parenthesis is increasing in the interval

    The function f open parentheses x close parentheses equals cos invisible function application left parenthesis pi divided by x right parenthesis is increasing in the interval

    Maths-General
    General
    Maths-

    The values of a in order that f open parentheses x close parentheses equals square root of 3 sin invisible function application x minus cos invisible function application x minus 2 a x plus b decreases for all real values of x, is given by

    The values of a in order that f open parentheses x close parentheses equals square root of 3 sin invisible function application x minus cos invisible function application x minus 2 a x plus b decreases for all real values of x, is given by

    Maths-General
    General
    Maths-

    If the ratio of base radius and height of a cone is 1 blank colon 2 and percentage error in radius is lambda blank percent sign comma then the error in its volume is

    If the ratio of base radius and height of a cone is 1 blank colon 2 and percentage error in radius is lambda blank percent sign comma then the error in its volume is

    Maths-General
    parallel
    General
    Maths-

    The value of c in (0, 2) satisfying the Mean value theorem for the function f open parentheses x close parentheses equals x open parentheses x minus 1 close parentheses to the power of 2 end exponent comma blank x element of left square bracket 0 comma blank 2 right square bracket is equal to

    The value of c in (0, 2) satisfying the Mean value theorem for the function f open parentheses x close parentheses equals x open parentheses x minus 1 close parentheses to the power of 2 end exponent comma blank x element of left square bracket 0 comma blank 2 right square bracket is equal to

    Maths-General
    General
    Maths-

    The value of x for which 1 plus x log subscript e end subscript invisible function application open parentheses x plus square root of x to the power of 2 end exponent plus 1 end root close parentheses greater or equal than square root of x to the power of 2 end exponent plus 1 end root a r e

    The value of x for which 1 plus x log subscript e end subscript invisible function application open parentheses x plus square root of x to the power of 2 end exponent plus 1 end root close parentheses greater or equal than square root of x to the power of 2 end exponent plus 1 end root a r e

    Maths-General
    General
    Maths-

    If the curve y equals a x to the power of 3 end exponent plus b x to the power of 2 end exponent plus c x is inclined at 45 degree to x-axis at (0, 0) but touches x-axis at (1, 0), then

    If the curve y equals a x to the power of 3 end exponent plus b x to the power of 2 end exponent plus c x is inclined at 45 degree to x-axis at (0, 0) but touches x-axis at (1, 0), then

    Maths-General
    parallel
    General
    Biology

    Half-life of 14 C is …A… material used in determining the age of fossil is …B… . Here A and B refers to

    Half-life of 14 C is …A… material used in determining the age of fossil is …B… . Here A and B refers to

    BiologyGeneral
    General
    Biology

    XX’ is a type of selection process in evolution ‘XX’ promotes the population changes in one particular direction ‘XX’ favours small or large sized individuals, mean size of population changes in ‘XX’. Identify ‘XX’

    XX’ is a type of selection process in evolution ‘XX’ promotes the population changes in one particular direction ‘XX’ favours small or large sized individuals, mean size of population changes in ‘XX’. Identify ‘XX’

    BiologyGeneral
    General
    Biology

    Which of the following sets contain only homologous organs?

    Which of the following sets contain only homologous organs?

    BiologyGeneral
    parallel
    General
    Biology

    Variations in a progeny takes place due to

    Variations in a progeny takes place due to

    BiologyGeneral
    General
    Biology

    What is the basis of Hugo de Vries theory of mutation?

    What is the basis of Hugo de Vries theory of mutation?

    BiologyGeneral
    General
    Biology

    According to fossils discovered upto present time origin and evolution of man was started from which country?

    According to fossils discovered upto present time origin and evolution of man was started from which country?

    BiologyGeneral
    parallel
    General
    Biology

    Genetic equilibrium means

    Genetic equilibrium means

    BiologyGeneral
    General
    Biology

    How did George Cuvier accounts for the extinctions in nature

    How did George Cuvier accounts for the extinctions in nature

    BiologyGeneral
    General
    Biology

    Half-life of 14 C is …A… material used in determining the age of fossil is …B… . Here A and B refers to

    Half-life of 14 C is …A… material used in determining the age of fossil is …B… . Here A and B refers to

    BiologyGeneral
    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.