ar = 16
ar^4 = 2
divide the 2nd equation by the first
ar^4/ar = 2/16
r^3 = 1/8
r = 1/2
back in first:
ar= 16
(1/2)a = 16
a = 32
The second and fifth terms of a geometric progressions are 16 and 2 respectively. Determine the common ratio and the first term
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32
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