what is the sum of 1/squirt of n➋+1
The Binomial Therorem - the expansion of (1/squirt of n➋+1 ) = (1 + n^2)^(-1/2)
(1 + n^2)^(-1/2) = 1 + (-1/2),n^2 + (-1/2).(-3/2)/2!.(n^2)^2 + (-1/2).(-3/2)(-5/2)/3!.(n^2)^3 + ... + pCr.(n^2)^r + ...
And,
t_(r+1) = pCr.(n^2)^r, where t_(r+1) is the rth term in the series and p is the index of the original binomial expression (1 + n^2), and p = (-1/2)