The Total solution for NCERT class 6-12
Find the sum to n terms of each of the series in Exercises 1 to 7.
1 ├Ч 2 + 2 ├Ч 3 + 3 ├Ч 4 + 4 ├Ч 5 + тАж
Given series is 1 ├Ч 2+ 2 ├Ч 3 + 3 ├Ч 4 + 4 ├Ч 5 + тАж
ItтАЩs seen that,
nth┬аterm,┬аan┬а=┬аn┬а(┬аn┬а+1)
Then, the sum of nterms of the series can be expressed as