优优班--学霸训练营 > 知识点挑题
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            • 1.
              已知函数\(f(x)=a^{x}(a > 0,a\neq 1)\),若\(f(-2) < f(-3)\),则\(a\)的取值范围是\((\)  \()\)
              A.\(2 < a < 3\)
              B.\( \dfrac {1}{3} < a < \dfrac {1}{2}\)
              C.\(a > 1\)
              D.\(0 < a < 1\)
            • 2.
              已知\(a=( \dfrac {1}{3})^{-1.1},b=π^{0},c=3^{0.9}\),则\(a\),\(b\),\(c\)三者的大小关系是\((\)  \()\)
              A.\(c < b < a\)
              B.\(c < a < b\)
              C.\(b < a < c\)
              D.\(b < c < a\)
            • 3.

              已知\(a={{(0.3)}^{3}}\),\(b={{\log }_{3}}0.3\),\(c={{\log }_{0.3}}3\);则下列大小关系表示正确的是\((\)     \()\)

              A.\(a > b > c\)
              B.\(a > c > b\)

              C.\(b > a > c\)
              D.\(c > a > b\)
            • 4.

              若\(a > b > 0\)且\(a,b\)均不为\(1,0 < c < 1\),则

              A.\({{\log }_{a}}c < {{\log }_{b}}c\)
              B.\({{\log }_{c}}a < {{\log }_{c}}b\)
              C.\({{a}^{c}} < {{b}^{c}}\)
              D.\({{c}^{a}} > {{c}^{b}}\)
            • 5.

              已知函数\(f(x)={{a}^{x}}(a > 0\)且\(a\ne 1)\)在\([-1,1]\)上的最大值与最小值之差为\(\dfrac{3}{2}\).

              \((\)Ⅰ\()\)求实数\(a\)的值;

              \((\)Ⅱ\()\)若\(g(x)=f(x)-f(-x)\),当\(a > 1\)时,解不等式\(g({{x}^{2}}+2x)+g(x-4) > 0\).

            • 6.

              将指数函数\(f\left(x\right) \)的图象向右平移一个单位,得到如图的\(g\left(x\right) \)的图象,则\(f\left(x\right) =(\)    \()\)       


              A.\({\left( \dfrac{1}{3}\right)}^{x} \)
              B.\({3}^{x} \)       

              C.\({\left( \dfrac{1}{2}\right)}^{x} \)
              D.\({2}^{x} \)
            • 7.

              \(12.\)已知函数\(f\left(x\right)={a}^{x}+{\log }_{a}x \)\(a > 0 \)且\(a\neq 1 \)在\(\left[1,2\right] \)上的最大值与最小值之和为\({\log }_{a}2+6 \),则\(a\)的值为           (    )

              A.\(\dfrac{1}{2} \)
              B.\(\dfrac{1}{4} \)
              C.\(2\)
              D.\(4\)
            • 8.

              已知函数\(f(x)=|2^{x}-1|\),\(a < b < c\),且\(f(a) > f(c) > f(b)\),则下列结论中,必成立的是\((\)   \()\).

              A.\(a < 0\),\(b < 0\),\(c < 0\)
              B.\(a < 0\),\(b\geqslant 0\),\(c > 0\) 
              C.\(2^{-a} < 2^{c\;\;}\)
              D.\(2^{a}+2^{c} < 2\)
            • 9.

              设\(a={\log }_{3}0.2 \),\(b={3}^{0.2} \),\(c=0.{2}^{0.3} \),则有(    )

              A.\(a < b < c \)
              B.\(c < b < a \)
              C.\(c < a < b \)
              D.\(a < c < b \)
            • 10.

              已知函数\(f(x)=\ln x-0.5^{x}+1\),则不等式\(f(2x-3) < 0.5\)的解集为\((\)  \()\)。

              A.\(\{x|-1 < x < 1.5\}\)
              B.\(\{x|0.5 < x < 2\}\)
              C.\(\{x|x < 2\}\)
              D.\(\{x|1.5 < x < 2\}\)
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