Please solve the problem from binomial theorem.1) Find the coefficient of x^65 in the expansion of x(x+1)^2(x+2)^3(x+3)^4.........(x+10)^112). Find the coefficient of x^(n^2+n-14)/2 in the expansion of (x-1)(x^2-2)(x^3 -3).........(x^n-n)
Please solve the problem from binomial theorem.
1) Find the coefficient of x^65 in the expansion of x(x+1)^2(x+2)^3(x+3)^4.........(x+10)^11
2). Find the coefficient of x^(n^2+n-14)/2 in the expansion of (x-1)(x^2-2)(x^3 -3).........(x^n-n)










