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Let fk(x)=1/k(sin^kx+cos^kx)" where "x i...

Let `f_k(x)=1/k(sin^kx+cos^kx)" where "x in R and kge1. " Then "f_4(x) -f_6(x)` equals

A

`(1)/(4)`

B

`(1)/(12)`

C

`(1)/(6)`

D

`(1)/(3)`

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The correct Answer is:
B
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RESONANCE ENGLISH-FUNDAMENTAL OF MATHEMATICS-Exercise
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  7. Let fk(x)=1/k(sin^kx+cos^kx)" where "x in R and kge1. " Then "f4(x) -f...

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  8. Let A and B be two sets containing 2 elements and 4 elements, respecti...

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