This is a calculation method for dividing a polynomial in x by a linear expression of the form x - a. For example, if you were to divide 2 x 3 - x +1 by x +3, you would do it like this. In general, when dividing c 0 x n + c 1 x n -1 + c 2 x n -2 + ... + c n -1 x + c n by x - a , if you use b 0 = c 0 , b 1 = c 1 - ab 0 , b 2 = c 2 - ab 1 , ... , b n -1 = c n -1 - ab n -2 , r = c n - ab n -1 , the quotient will be b 0 x n -1 + b 1 x n -2 + b 2 x n -2 + ... + b n -1 , and the remainder will be r . Source: Heibonsha World Encyclopedia, 2nd Edition Information |
xの多項式をx-aの形の一次式で割るときの計算法で,例えば2x3-x+1をx+3で割るとしたら,のようにする。 一般にc0xn+c1xn-1+c2xn-2+……+cn-1x+cnをx-aで割るときの計算は,b0=c0,b1=c1-ab0,b2=c2-ab1,……,bn-1=cn-1-abn-2,r=cn-abn-1として計算すれば,商がb0xn-1+b1xn-2+b2xn-2+……+bn-1で,余りがrになる。
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