f/math
posted by dennis .
the common ratio of a g.p is 2.if the 5th term is greater than the first term by 45, find the 5tth term

Is g.p. supposed to mean geometric progression? You should not assume that we know that.
The fifth term will be 2^3 = 8 times the second term
a5 = 8 a2
a5 = a2 + 45
0 = 7 a2 45
a2 = 45/7
a3 = 90/7
a4 = 180/7
a5 = 360/7
Check: a5  a2 = 315/7 = 45