Question Detail
Question
Find the coefficient of x⁴ in the binomial expansion of (1-2x)⁷
Correct Answer
Option C is the correct answer.
Detailed Explanation
Using binomial theorem, the term with x⁴ is C(7,4) × 1^(7-4) × (-2x)⁴ = C(7,4) × (-2)⁴ × x⁴ = 35 × 16 × x⁴ = 560 x⁴.
Hint
Use binomial theorem formula: C(n,r) a^(n-r) b^r.