Question

The general term in the expansion of (x + a)ⁿ

(A) ⁿC_r x^n-r .a^r

(B) ⁿC_r x^r .a^r

(C) ⁿC_n-r x^n-r.a^r

(D) ⁿC_n-r x^r.a^n-r

Answer 1

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-r a^r