优优班--学霸训练营 > 知识点挑题
全部资源
          排序:
          最新 浏览

          50条信息

            • 1.
              已知函数\(f(x)=a^{-x}(a > 0\)且\(a\neq 1)\),且\(f(-2) > f(-3)\),则\(a\)的取值范围是 ______ .
            • 2.
              方程\(( \dfrac {1}{3})^{x}=|\log _{3}x|\)的解的个数是\((\)  \()\)
              A.\(0\)个
              B.\(1\)个
              C.\(2\)个
              D.\(3\)个
            • 3.

              函数\(f(x)= \dfrac{{2}^{x}}{1+{2}^{x}}- \dfrac{1}{2} \),\(\left[x\right] \)表示不超过\(x\)的最大整数,则函数\(y=\left[f\left(x\right)\right] \)的值域为

              A.\(\left\{0\right\} \)
              B.\(\left\{-1,0,1\right\} \)
              C.\(\left\{-1,0\right\} \)
              D.\(\left\{-2,0\right\} \)
            • 4.
              下列函数中,满足“\(f(x+y)=f(x)f(y)\)”的单调递增函数是\((\)  \()\)
              A.\(f(x)=x^{3}\)
              B.\(f(x)=x\;^{ \frac {1}{2}}\)
              C.\(f(x)=3^{x}\)
              D.\(f(x)=( \dfrac {1}{2})^{x}\)
            • 5.
              函数\(f(x)=a^{x}(a > 0,a\neq 1)\)的图象恒过点\((\)  \()\)
              A.\((0,0)\)
              B.\((0,1)\)
              C.\((1,0)\)
              D.\((a,0)\)
            • 6.
              函数\(y=a^{x-1}+1(a > 0\)且\(a\neq 1)\)的图象恒有定点 ______ .
            • 7.
              若点\((n,3)\)在函数\(y=3^{x}\)的图象上,则\(\cos \dfrac {π}{3n}\)的值是 ______ .
            • 8.

              设函数\(f(x)=\begin{cases} {{2}^{1-x}} & (x\leqslant 1) \\ 1-{{\log }_{2}}x & (x > 1) \end{cases}\),则满足\(f(x)\leqslant 2\)的\(x\)的取值范围是\((\)   \()\)

              A.\([-1,2]\)       
              B.\([0,2]\)     
              C.\([1,+\infty )\)     
              D.\([0,+\infty )\)
            • 9.

              若\(f\left( x \right)\)是定义在\(\left( -1,1 \right)\)上的减函数,则下列不等式正确的是(    )      

              A.\(f\left( \dfrac{{{x}^{2}}+1}{2} \right) > f\left( x \right)\)
              B.\(f\left( \sin x \right) > f\left( \cos x \right){ }\)
              C.\(f\left( \tan x \right) > f\left( \sin x \right){ }\)
              D.\(f\left( \dfrac{1}{{{3}^{x}}+1} \right) > f\left( \dfrac{1}{{{2}^{x}}+1} \right){ }\)
            • 10.

              已知集合\(A=\left\{x|0 < {{\log }_{2}}^{x} < 2\right\},B=\left\{y|y={3}^{x}+2,x∈R\right\} \),则\(A∩B= (\) \()\)

              A.\(\left(1,4\right) \)
              B.\(\left(2,4\right) \)
              C.\(\left(1,2\right) \)
              D.\(\left(1,+∞\right) \)
            0/40

            进入组卷