माना f(k) (x)= (1)/(k) (sin ^(k) x + cos...

माना `f_(k) (x)= (1)/(k) (sin ^(k) x + cos^(k) x)` है ,जहाँ `x epsilon R ` तथा ` k ge 1` है तो `f_(4) (x)- f_(6) (x)` बराबर है।

A

`(1)/(12)`

B

`(1)/(6)`

C

`(1)/(3)`

D

`(1)/(4)`

लिखित उत्तर

Verified by Experts

The correct Answer is:

A

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