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19 December, 20:02

What is the value of the fourth term in a geomtric sequence for which a1=15

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  1. 19 December, 20:22
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    Hello,

    If you know the ration (i don't)

    a (4) = a (3) * r=a (2) * r²=a (1) * r^3

    ==>a (4) = 15*r^3
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