यदि f(x)=(ab-b^2-2)x+int0^x(cos^4 theta ...

यदि `f(x)=(ab-b^2-2)x+int_0^x(cos^4 theta +sin^4 theta)d theta,AA x in R, b in R` में हासमान है,जहाँ `b , x` से स्वतन्त्र है, तब

A

`a in (0,sqrt6)`

B

`a in (-sqrt6, sqrt6)`

C

`ain (-sqrt6,0)`

D

इनमें से कोई नहीं

लिखित उत्तर

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The correct Answer is:

B

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