1/ \(f\left(x\right)=F'\left(x\right)=15x^2+8x-7\)
2/
Gọi \(Q\left(x;y;z\right)\) \(\Rightarrow\left\{{}\begin{matrix}\overrightarrow{MN}=\left(1;-1;-2\right)\\\overrightarrow{QP}=\left(-1-x;2-y;1-z\right)\end{matrix}\right.\)
Tứ giác MNPQ là hbh \(\Leftrightarrow\overrightarrow{MN}=\overrightarrow{QP}\)
\(\Leftrightarrow\left\{{}\begin{matrix}-1-x=1\\2-y=-1\\1-z=-2\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}x=-2\\y=3\\z=3\end{matrix}\right.\) \(\Rightarrow Q\left(-2;3;3\right)\)