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फलन f(x) जो f(x)=cos^(4)x+Kcos^(2)2x+sin...

फलन f(x) जो `f(x)=cos^(4)x+Kcos^(2)2x+sin^(4)x` द्वारा परिभाषित है जहाँ K नियतांक है यदि फलन f(x) अचार है तो k का मान है -

A

`-1`

B

`-1//2`

C

0

D

`1//2`

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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