Cách làm cho bạn:
Ta có:
a)
$Q(x)=x^{5}−x^{3}+2−F(x)$
$=x^{5}−x^{3}+2−(x^{7}−\frac{1}{2}x^{3}+x+1$)
$=x^{5}−x^{3}+2−x^{7}+\frac{1}{2}x^{3}−x−1$
$=−x^{7}+x^{5}−\frac{1}{2}x^{3}−x+1$
Vậy $Q(x) = −x^{7}+x^{5}−\frac{1}{2}x^{3}−x+1$
b)
=>$ R(x) = F(x) - 2$
= $x^{7}−\frac{1}{2}x^{3}+x+1−2$
$=x^{7}−\frac{1}{2}x^{3}+x−1$
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