Question Detail
Question
Find the fourth term of (x + y)^7
Correct Answer
Option C is the correct answer.
Detailed Explanation
In binomial expansion (x+y)^7, the (r+1)th term is C(7,r) x^(7-r) y^r. Fourth term means r=3: T₄ = C(7,3) x^(7-3) y^3 = 35 x^4 y^3.
Hint
The general term is C(n,r) x^(n-r) y^r.