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  • when P(x) is divided by (x-1),the remainder is -2 ,When P(x) is divided by(x+1),the remainder is -8.Determine remainder

    when P(x) is divided by (x-1),the remainder is -2 ,When P(x) is divided by(x+1),the remainder is -8.Determine remainder when P(x) is divided by x²-1.
    數(shù)學(xué)人氣:351 ℃時間:2020-06-02 19:46:50
    優(yōu)質(zhì)解答
    設(shè)P(x) = C(x) * (x^2-1) + ax + b,(ax+b)為余式.
    則由ax+b = a(x-1) + (b+a) 得知 b+a = -2
    由ax+b = a(x+1) + (b-a) 得知b-a=-8 所以解得 b=-5,a=3
    所以P(x)除以(x^2-1) 剩下 3x-5
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