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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

f/math 
drwls
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
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