₦airaland Forum

ibadanfinest:
First term of an ap is A
Third term is a+2d.
third term is more than first term by 10.
a+2d-10=a or a+2d=a+10

using a+2d=a+10
a cancel a
2d=10
d=5

solvind for a
7th terms is seven times that of a
7th term a+6d=7a
d=5
a+30=7a
a=5