Question

write first four terms of the AP, when the first term a and the common difference d are given as follows...

Answer 1

a = - 1.25
d = -0.25

First 4 terms

$a_{2} = a + d = - 1.25 + ( - 0.25) = - 1.50 \\ \\ a_{3} = a + 2d = - 1.25 + 2( - 0.25) = - 1.25 - 0.50 = - 1.75 \\ \\ a_{4} = a + 3d = - 1.25 + 3( - 0.25) = - 1.25 - 0.75 = - 2.00$
So AP is

-1.25 , -1.50 , - 1.75 , - 2.00 ,.......