Question

What is the 4th term in the binomial expansion of (a+b)^6)?

A.20a^3 b^3
B.20a^2 b^4
C.15a^3 b^3
D.15a^4 b^2

Answer 1

a

Explanation:

Answer 2

option A) that is 20a^3 b^3

Explanation:

Given in the question the equation,

(a+b)^6

Formula for binomial expansion up to 4th term of (a+b)^6)

1st term 2nd term 3rd term 4th term

6C0 (a)^6(b)^0 + 6C1 (a)^5(b)^1 + 6C2 (a)^4(b)^2 + 6C3 (a)^3(b)^3 + ....

Hence, the 4th term in the binomial expansion of (a+b)^6 = 6C3 (a)^3(b)^3

= 20 (a)^3(b)^3