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Find the sum of the n terms of the serie...

Find the sum of the n terms of the series whose nth term are given below : (i) `3n^(2)+2n` (ii) `2n^(3)+4n+1`
(iii) `2^(n)+3^(n)` (iv) `3^(n)+n^(3)`

Text Solution

Verified by Experts

The correct Answer is:
(i)`(1)/(2)n(n+1)(2n+3)` (ii) `(1)/(2)n(n^(3)+2n^(2)+5n+6)`
(iii) `2cdot(2^(n)-1)+(3(n^(n)-1))/(2)` (iv) `(3cdot(3^(n-1)))/(2)+(1)/(4)n^(2)(n+1)^(2)`
N/a
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