等比数列中前n项和的性质的应用已知一个等比数列的首项为1 项数为偶数 奇数项的和为85偶数项的和为170 求此数列的公比和项数要过程
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![等比数列中前n项和的性质的应用已知一个等比数列的首项为1 项数为偶数 奇数项的和为85偶数项的和为170 求此数列的公比和项数要过程](/uploads/image/z/2584916-44-6.jpg?t=%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%E4%B8%AD%E5%89%8Dn%E9%A1%B9%E5%92%8C%E7%9A%84%E6%80%A7%E8%B4%A8%E7%9A%84%E5%BA%94%E7%94%A8%E5%B7%B2%E7%9F%A5%E4%B8%80%E4%B8%AA%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%E7%9A%84%E9%A6%96%E9%A1%B9%E4%B8%BA1+%E9%A1%B9%E6%95%B0%E4%B8%BA%E5%81%B6%E6%95%B0+%E5%A5%87%E6%95%B0%E9%A1%B9%E7%9A%84%E5%92%8C%E4%B8%BA85%E5%81%B6%E6%95%B0%E9%A1%B9%E7%9A%84%E5%92%8C%E4%B8%BA170+%E6%B1%82%E6%AD%A4%E6%95%B0%E5%88%97%E7%9A%84%E5%85%AC%E6%AF%94%E5%92%8C%E9%A1%B9%E6%95%B0%E8%A6%81%E8%BF%87%E7%A8%8B)
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