Question

does the following numbers from an AP? justify your answer find common difference -5,-8,-11,-14

Answer 1

Let
a1=-5,a2=-8,a3=-11,a4=-14

i)a2-a1=-8-(-5)=-8+5=-3
ii)a3-a2==-11-(-8)=-11+8=-3
iii)a4-a3=-14-(-11)=-14+11=-3
Therefore
Common difference=d=a2-a1=a3-a2=a4-a3=-3
-5,-8,-11,-14, are in ap