Question

If the coefficient of ? () in the expansion of (? 4 + 1)> is 210 , then the coefficient of ? (? is

Answer 1

I don't know frnd! Sorry!

Answer 2

Answer:

If the coefficient of x^{12} in the expansion of (x^3 + 1)^m is 210,then the coefficient of x^{15} ... if m=10, then 10C6(x3)4(1)6 = 210x12 so,.