Question

(iii) Find the sum to 8 terms of the series
1 +3 + 9 +27 +..........
(0) Find the sum of n terms of the
1+13+3+33+............​

Answer 1

Answer:

C ज़ंग जमनालालजी सर्विस zee ఉండవచ్చు తీవ్రస్థాయి

Answer 2

Tn=13+23+33+......+n31+3+5+7+..... .+(2n-1) =(n(n+1)2)2n2[1+(2n-1)] =n2(n+1)24× n2. Tn=(n+1)24 9∑x=1Tn=9∑n=1(n+1)24