3.
\((1)\int_{0}^{1}(\sqrt{1{-}(x{-}1)^{2}}{-}2x)dx{=}\) ______ .
\((2)\)设\(S_{n}\)是公差为\(d\)的等差数列\(\{ a_{n}\}\)的前\(n\)项和,则数列\(S_{6}{-}S_{3}{,}S_{9}{-}S_{6}{,}S_{12}{-}S_{9}\)是等差数列,且其公差为\(9d{.}\)通过类比推理,可以得到结论:设\(T_{n}\)是公比为\(2\)的等比数列\(\{ b_{n}\}\)的前\(n\)项积,则数列\(\dfrac{T_{6}}{T_{3}}{,}\dfrac{T_{9}}{T_{6}}{,}\dfrac{T_{12}}{T_{9}}\)是等比数列,且其公比的值是______ .
\((3)\) 函数\(f(x){=}ax^{3}{-}3x\)在区间\(({-}1{,}1)\)上为单调减函数,则\(a\)的取值范围是______ .
\((4)\) 设函数\(f(x)\)在其定义域\(D\)上的导函数为\(f{{{{'}}}}(x){.}\)如果存在实数\(a\)和函数\(hh(x)\),其中\(hhh(x)\)对任意的\(x{∈}D\)都有\(hh(x){ > }0\),使得\(f´(x)=h(x)(x^{2}-ax+1)\),则称函数\(f(x)\)具有性质\(P(a){.}\)给出下列四个函数:
\({①}f(x){=}\dfrac{1}{3}x^{3}{-}x^{2}{+}x{+}1\);
\({②}f(x){=}\ln x{+}\dfrac{4}{x{+}1}\);
\({③}f(x){=}(x^{2}{-}4x{+}5)e^{x}\);
\({④}f(x){=}\dfrac{x^{2}{+}x}{2x{+}1}\),
其中具有性质\(P(2)\)的函数是______\({.}(\)写出所有满足条件的函数的序号\()\)