The sum of n terms of an AP is
3n+5. Then find the AP.
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Formula of nth term in A.P is a+(n-1)d
Where “a” is ist term and “d” is common difference
according to qustion
a+(n-1)d=3n+5
a+nd-d=3n+5
nd+(a-d) =3n+5
Compare this equation,we get
d=3 & a-d=5
a-3=5
a=8
Seventh term=
8+(7–1)3
Ans will be 26
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