(x+1)^3=a3x^3+ax^2+a1x+a0
(x+1)(x+1)^2=a3x^3+ax^2+a1x+a0
x^3+3x^2+3x+1=a3x^3+a2x^2+a1x+a0
对比系数:
a3=1,a2=3,a1=3,a0=1
已知(x+1)的三次方=a3x的三次方+a2x的二次方+a1x+a0的值
已知(x+1)的三次方=a3x的三次方+a2x的二次方+a1x+a0的值
数学人气:217 ℃时间:2020-01-02 18:48:36
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