Question

Find the ${30}^{th}$ term of the A.P 3,8,13,..........253

Answer 1

Given $A.P3,8,13,...........,253$

first term $=3$

common difference $\left(d\right)=5$

nth term $a_n=a+(n-1)d$

$\therefore a_{30}=a+(30-1)d=3+29\times 5$

$=3+145$

$=148$