Question

Answer the following:
If a=5, d=3 and $a_n=50$ then find n.

Answer 1

We have,

$a=5,d=3,a_n=50$

We know that $n$th term of A.P.

$=a+(n-1)d$

Therefore,

$50=5+(n-1)3$

$45=(n-1)3$

$15=n-1$

$n=16$

Hence, this is the answer.