The Total solution for NCERT class 6-12
Given series is 3 ├Ч12┬а+5 ├Ч 22┬а+ 7 ├Ч 32┬а+ тАж
ItтАЩs seen that,
nth┬аterm,┬аan┬а= ( 2n┬а+1)┬аn2┬а= 2n3┬а+┬аn2
Then, the sum of nterms of the series can be expressed as
