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Maths-

General

Easy

Question

If I_n is the identity matrix of order n, then (I_n)^–1</su

does not exist
equal to I_n
equals to O
nI_n

The correct answer is: equal to I_n

I_n. I_n = I_n Þ I_n^-¹ = I_n

Related Questions to study

If I = $open square brackets table row 1 0 row 0 1 end table close square brackets$ , J = $open square brackets table row 0 1 row cell negative 1 end cell 0 end table close square brackets$ and B = $open square brackets table row cell cos invisible function application theta end cell cell sin invisible function application theta end cell row cell negative sin invisible function application theta end cell cell cos invisible function application theta end cell end table close square brackets$ , then B equals

If I = $open square brackets table row 1 0 row 0 1 end table close square brackets$ , J = $open square brackets table row 0 1 row cell negative 1 end cell 0 end table close square brackets$ and B = $open square brackets table row cell cos invisible function application theta end cell cell sin invisible function application theta end cell row cell negative sin invisible function application theta end cell cell cos invisible function application theta end cell end table close square brackets$ , then B equals

If A‘ is the transpose of a square matrix A, then

If A‘ is the transpose of a square matrix A, then

$open vertical bar table row 103 115 114 row 111 108 106 row 104 113 116 end table close vertical bar plus open vertical bar table row 113 116 104 row 108 106 111 row 115 114 103 end table close vertical bar$ is equal to :

$open vertical bar table row 103 115 114 row 111 108 106 row 104 113 116 end table close vertical bar plus open vertical bar table row 113 116 104 row 108 106 111 row 115 114 103 end table close vertical bar$ is equal to :

parallel

The system AX = B of n equations in n unknowns has infinitely many solutions if

The system AX = B of n equations in n unknowns has infinitely many solutions if

The value of $open vertical bar table row cell sin invisible function application theta end cell cell cos invisible function application theta end cell cell sin invisible function application 2 theta end cell row cell sin invisible function application open parentheses theta plus fraction numerator 2 pi over denominator 3 end fraction close parentheses end cell cell cos invisible function application open parentheses theta plus fraction numerator 2 pi over denominator 3 end fraction close parentheses end cell cell sin invisible function application open parentheses 2 theta plus fraction numerator 4 pi over denominator 3 end fraction close parentheses end cell row cell sin invisible function application open parentheses theta minus fraction numerator 2 pi over denominator 3 end fraction close parentheses end cell cell cos invisible function application open parentheses theta minus fraction numerator 2 pi over denominator 3 end fraction close parentheses end cell cell sin invisible function application open parentheses 2 theta minus fraction numerator 4 pi over denominator 3 end fraction close parentheses end cell end table close vertical bar$ is :

The value of $open vertical bar table row cell sin invisible function application theta end cell cell cos invisible function application theta end cell cell sin invisible function application 2 theta end cell row cell sin invisible function application open parentheses theta plus fraction numerator 2 pi over denominator 3 end fraction close parentheses end cell cell cos invisible function application open parentheses theta plus fraction numerator 2 pi over denominator 3 end fraction close parentheses end cell cell sin invisible function application open parentheses 2 theta plus fraction numerator 4 pi over denominator 3 end fraction close parentheses end cell row cell sin invisible function application open parentheses theta minus fraction numerator 2 pi over denominator 3 end fraction close parentheses end cell cell cos invisible function application open parentheses theta minus fraction numerator 2 pi over denominator 3 end fraction close parentheses end cell cell sin invisible function application open parentheses 2 theta minus fraction numerator 4 pi over denominator 3 end fraction close parentheses end cell end table close vertical bar$ is :

$open parentheses fraction numerator 2 i over denominator 1 plus i end fraction close parentheses to the power of 2 end exponent$ is equal to

$open parentheses fraction numerator 2 i over denominator 1 plus i end fraction close parentheses to the power of 2 end exponent$ is equal to

parallel

If z lies on the circle ½z½=1, then $fraction numerator 2 over denominator z end fraction$ lies on

If z lies on the circle ½z½=1, then $fraction numerator 2 over denominator z end fraction$ lies on

If z = x + iy, and $w equals fraction numerator 1 minus i z over denominator z minus i end fraction comma$ then ½w½ = 1 implies that in the complex plane

If z = x + iy, and $w equals fraction numerator 1 minus i z over denominator z minus i end fraction comma$ then ½w½ = 1 implies that in the complex plane

If $open vertical bar fraction numerator z subscript 1 end subscript over denominator z subscript 2 end subscript end fraction close vertical bar$ =1 and arg (z₁ z₂) = 0, then

If $open vertical bar fraction numerator z subscript 1 end subscript over denominator z subscript 2 end subscript end fraction close vertical bar$ =1 and arg (z₁ z₂) = 0, then

parallel

A siren emitting sound of frequency 500 Hz is going away from a static listener with a speed of 50 m/sec The frequency of sound to be heard, directly from the siren

A siren emitting sound of frequency 500 Hz is going away from a static listener with a speed of 50 m/sec The frequency of sound to be heard, directly from the siren

Physics-General

The Doppler’s effect is applicable for

The Doppler’s effect is applicable for

Physics-General

Two vibrating tuning forks produce progressive waves given by y_l = 4 sin 500 pt and Y₂ = 2 sin 506pt Number of beats produced per minute is

Two vibrating tuning forks produce progressive waves given by y_l = 4 sin 500 pt and Y₂ = 2 sin 506pt Number of beats produced per minute is

Physics-General

parallel

If A = {1, 2, 3}, B = {3, 4}, C = {4, 5, 6}, then $left parenthesis A cross times B right parenthesis intersection left parenthesis B cross times C right parenthesis$ is equal to

If A = {1, 2, 3}, B = {3, 4}, C = {4, 5, 6}, then $left parenthesis A cross times B right parenthesis intersection left parenthesis B cross times C right parenthesis$ is equal to

$7 to the power of l o g subscript 7 end subscript open parentheses x to the power of 2 end exponent minus 4 x plus 5 close parentheses end exponent equals x minus 1 comma$ x may have values:

$7 to the power of l o g subscript 7 end subscript open parentheses x to the power of 2 end exponent minus 4 x plus 5 close parentheses end exponent equals x minus 1 comma$ x may have values:

In a group of children, 35 play football out of which 20 play footballs only, 22 play hockey; 25 play cricket out of which 11 play cricket only. Out of these 7 play cricket and football but bot hockey, 3 play football and hockey but not cricket and 12 play football and cricket both.
How many plays hockey only ?

In a group of children, 35 play football out of which 20 play footballs only, 22 play hockey; 25 play cricket out of which 11 play cricket only. Out of these 7 play cricket and football but bot hockey, 3 play football and hockey but not cricket and 12 play football and cricket both.
How many plays hockey only ?

parallel

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