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.

              幂函数\(f(x)=({{m}^{2}}-2m+1){{x}^{2m-1}}\)在\((0,+\infty )\)上为增函数,则实数\(m\)的值为\((\)   \()\)

              A.\(0\)
              B.\(1\)      
              C.   \(2\)     
              D.\(1\)或\(2\)
            • 2.

              若幂函数\(f(x)={{x}^{a}}\)的图像经过点满足\(\left( {} \right.2,\dfrac{1}{4}\left. {} \right)\),则\(a\)的值是______________.

            • 3.

              已知\(a={{\left( \dfrac{1}{3} \right)}^{\frac{2}{3}}},b={{\left( \dfrac{1}{4} \right)}^{\frac{1}{3}}},c=\log _{3}^{\pi }\),则\(a,b,c\)的大小关系为__________\(.(\)用“\( < \)”号连接\()\).

            • 4.

              已知函数\(f(x)=(2m^{2}-6m+5)x^{m+1}\)为幂函数且为偶函数.

              \((1)\)求\(f(x)\)的解析式;

              \((2)\)若函数\(y=f(x)-2(a-1)x+1\)在区间\((2,3)\)上为单调函数,求实数\(a\)的取值范围.

            • 5.

              已知集合 \(A=\left\{ x\left| y=\lg \left( 2-x \right) \right. \right\}\) ,集合\(B=\left\{ y\left| y=\sqrt{x} \right. \right\}\),则\(A\bigcap B{=}\)         

            • 6.

              函数\(f\left( x \right)=\left( {{m}^{2}}-m-1 \right){{x}^{{{m}^{2}}+m-1}}\)是幂函数,且在\(\left( 0,+\infty \right)\)上是减函数,则实数\(m\)为(    )

              A.\(1\)                 
              B.\(-1\)               
              C.\(2\)                
              D.\(-1\)或\(2\)
            • 7.

              抛物线\(y^{2}=8x\)与曲线\(xy=k(k > 0)\)交于点\(M\),若\(M\)到抛物线焦点\(F\)的距离为\(4\),则\(k=\)      

            • 8.

              已知\(a{=}(\sqrt{2})^{\frac{4}{3}}\),\(b{=}2^{\frac{2}{5}}\),\(c{=}9^{\frac{1}{3}}\),则\((\)  \()\)

              A.\(b < a < c\)
              B.\(a < b < c\)
              C.\(b < c < a\)
              D.\(c < a < b\)
            • 9.

              如图的曲线是幂函数\(y=x^{n}\)在第一象限内的图象\(.\)已知\(n\)分别取\(±2\),\(\pm \dfrac{1}{2}\)四个值,与曲线\(c_{1}\)、\(c_{2}\)、\(c_{3}\)、\(c\)相应的\(n\)依次为\((\)    \()\)

              A.\(2\),\(\dfrac{1}{2}\),\(-\dfrac{1}{2}\),\(-2\)
              B.\(2\),\(\dfrac{1}{2}\),\(-2\),\(-\dfrac{1}{2}\)
              C.\(-\dfrac{1}{2}\),\(-2\),\(2\),\(\dfrac{1}{2}\)
              D.\(-2\),\(-\dfrac{1}{2}\),\(\dfrac{1}{2}\),\(2\)
            • 10.

              已知\(n∈\{-2,-1,0,1,2,3\}\),若\({{(-\dfrac{1}{2})}^{n}} > {{(-\dfrac{1}{3})}^{n}}\),则\(n=\)________.

            0/40

            进入组卷