Question Detail
Question
In expansion of (1 + 2x)^4, find coefficient of x^3.
Correct Answer
Option A is the correct answer.
Detailed Explanation
T_4 = C(4,3)(2x)^3 = 4*8x^3=32x^3
Hint
General term: T_{r+1} = C(4,r)*(2x)^r*1^(4-r).