Question

Find the term $t_{13}$ of an A.P.
$4,9,14,....$

Answer 1

We have
$a=$ First term $=4$
$d=$ Common difference $=9-4=5$
We know that,
$t_n=a+(n-1)d$
$t_{13}=4+(13-1)\times 5$
$=4+12\times 5$
$=4+60$
$t_{13}=64$