If a=2, d=3. And n=90 then find an

Answers (1)

For the given A.P. 

First term (a) =2, Common difference (d) =3

a(90)= a +(n-1)d

a(90) = 2 + (90-1)x 3

a(90) = 2 + 89x 3

a(90) = 269

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