Question

if the sum of first n terms of an Ap is n^2 , find the 5th term of the AP?​

Answer 1

Answer:

Step-by-step explanation:

Let first term of the AP be a and the common difference be d.

Sn =n²(given)

Therefore,S1=(1)²

=1

Again,S2=(2)²

=4

Therefore,a=1

a2=S2-S1

=4-1

=3

So,d=3-1

=2

a5 =a+4d

=1+4(2)

=9

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Answer 2

Answer:

Step-by-step explanation: