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If alpha " and " beta be the coefficien...

If `alpha " and " beta` be the coefficients of ` x^4 " and x^2` respectively in the expansion of ` (x sqrt(x^2-1))^6+x-sqrt(x^2-1)^6` then :

A

48

B

60

C

-132

D

-60

Text Solution

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The correct Answer is:
C
NA
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