alleryThe general term T_(r+1) in the expansion of (a + b)^n is
AⁿC_r · a^r · b^(n−r)
BⁿC_r · a^(n−r) · b^r
CⁿC_r · a^n · b^r
DⁿC_r · a^(n+r) · b^r
Answer & Solution
Correct answer: B. ⁿC_r · a^(n−r) · b^r
T_(r+1) = ⁿC_r · a^(n−r) · b^r.
The 'r' index moves on b and complement on a.
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