Question
In the expansion of ( ax+bx)12, the coefficient of x−10 will be
Answer: Option C
:
C
Tr+1=12cr(ax)12−r(bx)r=12cr.a12−r.br.x2r−12∴2x−12=−10⇒r=1∴coefficient=12.a11.b
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:
C
Tr+1=12cr(ax)12−r(bx)r=12cr.a12−r.br.x2r−12∴2x−12=−10⇒r=1∴coefficient=12.a11.b
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