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The six term of a g.p -64/9 and it's common ratio is -2/3 find first term of g.p
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term(6) = ar^5 = -64/9, but r = -2/3
a(-2/3)^5 = -64/9
a(-32/243) = -4/9
a = (-64/9)(-243/32)
a = 54
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