Question Detail

MTH 101 MTH 101 Past Questions Objective Question

Question

Find the coefficient of x^3 in (2 − x)^5

Options
A -80
B 80
C -40
Correct Answer
D 40
Correct Answer

Option C is the correct answer.

Detailed Explanation

C(5,3)2^2(-1)^3 = 10 × 4 × -1 = -40

Hint

Be careful with powers of 2 and sign.

Question Info