Tn = (2n-1)(2n+1) = 4n^2-1
so
n
∑Tk = ∑4k^2-1 = 4∑k^2 - 4∑1
k=1
Now you know what ∑k^2 is and ∑1 = n
1.3+3.5+5.7+......to n terms.
sir this question answer 1/3n(4n^2+6n-1)
1 answer
sir this question answer 1/3n(4n^2+6n-1)
1 answer