10.
\((1)\)已知函数\(f\left( x \right)\)在\(R\)上可导,且\(f\left( x \right)={{x}^{2}}+2xf{{{'}}}\left( 2 \right)\),则函数\(f\left( x \right){= }\!\!\_\!\!{ }\!\!\_\!\!{ }\!\!\_\!\!{ }\!\!\_\!\!{ }\!\!\_\!\!{ }\!\!\_\!\!{ }\!\!\_\!\!{ }\!\!\_\!\!{ }\!\!\_\!\!{ }{.}\)
\((2)\)设曲线\(y={e}^{x} \)在点\((0,1)\)处的切线与曲线\(y= \dfrac{1}{x}\left(x > 0\right) \)上点\(P\)处的切线垂直,则\(P\)的坐标为___________.
\((3)\)经过点\(M(2,1)\)做直线\(l\)交双曲线\({{x}^{2}}-\dfrac{{{y}^{2}}}{2}=1\)于\(A\)、\(B\)两点,且\(M\)为\(AB\)的中点,则直线\(l\)的方程为_________________.
\((4)\)已知椭圆\(C\):\(\dfrac{{{x}^{2}}}{{{a}^{2}}}+\dfrac{{{y}^{2}}}{{{b}^{2}}}=1(a > b > 0)\)的左、右焦点为\({{F}_{1}}\)、\({{F}_{2}}\),若\(C\)上存在点\(P\)满足\(\overrightarrow{P{{F}_{1}}}\cdot \overrightarrow{P{{F}_{2}}} < 0\),则椭圆\(C\)的离心率的取值范围为_____________.