If the sum of the first n terms of an AP is 4n -nsquare what is the first term ? What is the sum of first two terms ? What is the second term ? Similarly find the 3rd the 10 th and the nth terms
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When Snth term is given then
Anth = Sn-Sn-1
First term= S1-S0
=4 (1)-(1)^2
=3
S2= 4 (2)-(2)^2
=8-4
=4
A3= 4 (3)-3^2
=-1
A10= 4 (10)-10^2
=60
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