Question
Mathematics Question on nth Term of an AP
Find the 4th term in the expansion of (-3a - b)5
A
9a2b3
B
30a2b3
C
-90a2b3
D
90a2b3
Answer
90a2b3
Explanation
Solution
The correct option is (D): 90a2b3
Find the 4th term in the expansion of (-3a - b)5
9a2b3
30a2b3
-90a2b3
90a2b3
90a2b3
The correct option is (D): 90a2b3