The general term in the expansion of (x + a)n(A) nCr xn-r .ar(B) n – InterviewSolution

InterviewSolution

1.

The general term in the expansion of (x + a)n(A) nCr xn-r .ar(B) nCr xr .ar(C) nCn-r xn-r.ar(D) nCn-r xr.an-r

Answer»

Answer is (A) ⁿC_r x^n-r.a^r

General term in the expansion of (x + a)ⁿ

⇒ T_r+1 = ⁿC_r x^n-ra^r

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