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posted by Jane on Sunday, July 6, 2014 at 9:18am.
The 8th term of a g.p is -7/32 fine it's common ration if its first term is 28
term 1 = a = 28 term 2 = a r term 3 = a r^2 term 8 = a r^7 = -7/32 28 r^7 = -7/32 r^7 = -1/(4*32) r^7 = -1/2^7 r = -1/2
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