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$$ f(X) = q(X)\cdot (X-\zeta) + y $$
这个等式可以解释为,任何一个多项式都可以除以另一个多项式,得到一个商多项式加上一个余数多项式。由于多项式在 $X=\zeta$ 处的取值为 $y$,那么我们可以确定:余数多项式一定为 $y$ ,因为等式右边的第一项在 $X=\zeta$ 处取值为零。
这里余数多项式一定为 $y$ 的原因是除数多项式为一阶多项式,而余数多项式的阶数一定小于除数多项式,所以余数多项式一定为常数,所以是$y$ 。
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这个等式可以解释为,任何一个多项式都可以除以另一个多项式,得到一个商多项式加上一个余数多项式。由于多项式在$X=\zeta$ 处的取值为 $y$ ,那么我们可以确定:余数多项式一定为 $y$ ,因为等式右边的第一项在 $X=\zeta$ 处取值为零。
这里余数多项式一定为$y$ 的原因是除数多项式为一阶多项式,而余数多项式的阶数一定小于除数多项式,所以余数多项式一定为常数,所以是$y$ 。
The text was updated successfully, but these errors were encountered: