Question

Find the first four terms of ap when first term is -1 and common difference is 1 by 2

Answer 1

Let the first four terms of AP be a, a+d, a+2d, a+3d.

Now, a=-1 and d=1/2

Then, a2= a+d=-1+1/2=-1/2

a3=a+2d=-1+2(1/2)=0

a4=a+3d=-1+3(1/2)=1/2

Therefore, AP formed is

-1,-1/2,0,1/2