10.
\((1)\)已知函数\(f( \dfrac{x+1}{x-1})=x \),则\(f(3)=\) ________ .
\((2)\)已知集合\(A=\left\{ \dfrac{1}{2} < {{2}^{x}} < 8 \right\}\),\(B=\{x|-1 < x < m+1\}\),若\(x∈\) \(B\)成立的一个充分不必要条件是\(x∈ A\),则实数\(m\)的取值范围是________ .
\((3)\)直线\(ρ\)\(\cos \)\(θ\)\(=2\)关于直线\(θ\)\(= \dfrac{π}{4}\)对称的直线直角坐标方程为________ .
\((4)\)已知\(x\),\(y\)的取值如表:
\(x\) | \(0\) | \(1\) | \(2\) | \(3\) | \(4\) |
\(y\) | \(1\) | \(1.3\) | \(3.2\) | \(5.6\) | \(8.9\) |
若依据表中数据所画的散点图中,所有样本点\((x_{i},y_{i})(i=1,2,3,4,5)\)都在曲线\(y= \dfrac{1}{2} x^{2}+a\)附近波动,则\(a=\) .