Question

which is the third term of the sequence whose n th term is 1/n square + 1​

Answer 1

Answer:

Tn = 2n +1

=> a+(n-1)d = 2n - 2 + 3

=> a+(n-1)d = 3 + 2(n-1)

On Comparing both sides, we get

a = 3

d = 2

T1 = 3

T2 = a +d = 3 + 2 = 5

T3 = a +2d = 3 + 2*2 = 7

First three terms are 3,5 and 7