If the 6 th term in the expansion of <img alt="\left[\sqrt{2^{\log \left(10-3^x\right)}+\sqrt[5]{2^{(x-2) \log 3}}}\right]^m" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cleft
If the 6 th term in the expansion of is equal to 21 and the binomial coefficient of 2nd, 3rd, 4th terms in its expansion represent the first, third and fifth terms of an A.P., then