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Mathematics, 15.02.2020 06:40 jetblackcap

設有兩等差級數,它們的比是(2n+3):(3n+2),試求它們的前11 項之和的比

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設有兩等差級數,它們的比是(2n+3):(3n+2),試求它們的前11 項之和的比...
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