1/5+1/16+1/25+1/41+1/60+1/85+1/113<1/2 chưng minh rang

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1/5+1/16+1/25+1/41+1/60+1/85+1/113<1/2 chưng minh rang

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Jade 1 tháng 2021-11-01T13:38:04+00:00 1 Answers 6 views 0

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    2021-11-01T13:39:26+00:00

    @Bongtrangdo

    1/114 <1/113 mà 1/113<…<1/16<1/5

    1/114+1/114+…+1/114 < 1/5+1/16+…+1/113

    ————————————

         57 phân số 

    =>57/114<1/5+1/16+…+1/113

    =>1/2<1/5+1/16+…+1/113

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