Answer:
option A) that is 20a^3 b^3
Step-by-step 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
