Question
Mathematics Question on Binomial theorem
If x22 is in the (r+1)th term of the binomial expansion of (3x3-x2)9, then the value of r is equal to
A
3
B
4
C
5
D
6
E
7
Answer
5
Explanation
Solution
The correct option is (C): 5
If x22 is in the (r+1)th term of the binomial expansion of (3x3-x2)9, then the value of r is equal to
3
4
5
6
7
5
The correct option is (C): 5