If A and B are coefficients of xn in the expansions of (1 + x)2n and (1 +x)2n–1 respectively, then A/B is equal to
We know that coefficient of xr in the expansion of (1 + x)m is mCr.
is a polynomial of degree
If n > I then value of the expression is
The coefficient of xk in the expansion of E = 1 + (1 + x) + (1 + x)2 +…+ (1 + x)n is