等比数列,a1=9,q=2,则S6等于?

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等比数列,a1=9,q=2,则S6等于?
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等比数列,a1=9,q=2,则S6等于?
等比数列,a1=9,q=2,则S6等于?

等比数列,a1=9,q=2,则S6等于?