Question

Write the first five terms of the following arthmetic progression where first term $a=3$, common difference $d=4$.

Answer 1

Here, $a=3$ and $d=4$
$t_n=a+(n-1)d$
Hence, $t_1=a=3$
$t_2=a+d=3+4=7$
$t_3=a+2d=3+8=11$
$t_4=a+3d=3+12=15$
$t_5=a+4d=3+16=19$
$\therefore$ The first five terms of the A.P. are $3,7,11,15,19$.