Question 1138516
In an Arithmetic sequence

A[n]= a+(n-1)d

a4=8 =a+3d................................1

a7=26=a+6d..............................2

solve 1 &2

subtract 1 from 2

6d-3d = 18
3d=18
d= 6
a+3d =8
a+3(6)=8
a=-10

First five terms -10,-4,2,8,14