Question

The sum of first n terms of an AP is given by Sn=2n²+3n. Find 16th term of AP

Answer 1

Hey there!
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First n terms:-

S1=2+3=5

Therefore,

S1=a=5

Therefore,

Therefore,

D=a2-a1

=s2=14
Therefore,

A2=9..

And d=a2-a1
=9-5=4


Therefore,

An=16??.


So an=a+(n-1)d
=5+15x4
=5+60
=65


So,

16th term is——)))) 65..


Hope it helps you..

Thanks!!


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