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

Toán Lớp 8: xác định a để (6×3 – 7×2 – x + a) (2x + 1) dư 1

Toán Lớp 8: xác định a để (6×3 – 7×2 – x + a) (2x + 1) dư 1

Comments ( 1 )

  1. Đặt f(x)=6x^3-7x^2-x+a,g(x)=2x+1

    Theo Bezout có :

    f((-1)/2)=6.((-1)/2)^3-7.((-1)/2)^2-(-1)/2+a= a-2

    Để f(x):g(x) dư 1

    ->a-2=1->a=3

    Vậy a=3

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

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