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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: CMR : `1³+2³+3³+…+99³\vdots 1+2+3+…+99`

Tháng Hai 19, 2023 Toán học 1 Comment 0 views

Toán Lớp 8: CMR : 1³+2³+3³+…+99³\vdots 1+2+3+…+99

Comments ( 1 )

  1. khanhngantoan
    khanhngantoan
    19 Tháng Hai, 2023 at 5:08 sáng
    Reply
    text{@dg}
    1^3+2^3+3^3+…+99^3$\vdots$1+2+3+…+99
    =(1+2+3+…+99)(1^2-…99^2)$\vdots$1+2+3+…+99

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222-9+11+12:2*14+14 = ? ( )

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