Question Detail
Question
The coefficient of \(x^7\) in the expansion of \((x - m)^{12}\) is
Correct Answer
Option B is the correct answer.
Detailed Explanation
General term: T_{r+1} = C(12,r) x^{12-r} (-m)^r. For x^7, 12-r=7 => r=5. Coefficient = C(12,5) (-1)^5 m^5 = -792 m^5.
Hint
Use T_{r+1} = C(n,r) a^{n-r} b^r.