# Mathematics

posted by Ashley

The second and fifth terms of a geometric progression (g.p) are 1 and 8 respectively. Find the common ratio,first term, and the eight term.

1. Steve

ar = 1
ar^4 = 8
Now divide and you get
r^3 = 8
r = 2
so, a = 1/2

T8 = ar^7 = 2^6 = 64

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