Question

Determine the sum of the series in terms of t.​

Answer 1

Answer:

Correct option is A)

T

n

=n(n+1)=n

2

+n

∴ Sum = S

n

=∑T

n

=∑n

2

+∑n=

6

n(n+1)(2n+1)

+

2

n(n+1)

=

6

n(n+1)

(2n+1+3)=

3

n(n+1)(n+2)

Hence, option 'A' is correct.

hope it helps you:)