Question 6
Binomial TheoremFind the third term in the expansion of (a − b)6 in ascending powers of b.
- A.−15a4b2
- B.15a4b2
- C.−15a3b3
- D.15a3b3
Show the answer and explanation
Answer: B (15a4b2)
Explanation
Third term = ⁶C₂ a⁴(−b)² = 15a⁴b².
Find the third term in the expansion of (a − b)6 in ascending powers of b.
Answer: B (15a4b2)
Third term = ⁶C₂ a⁴(−b)² = 15a⁴b².