共50条信息
若\(x∈[0,\dfrac{\pi }{2}]\),则函数\(f(x)=\sin x+\dfrac{2}{\sin x}\)的最小值为________.
已知\(f\left( \left. x+ \dfrac{1}{x} \right. \right)=x^{2}+ \dfrac{1}{x^{2}}\),则\(f(x)\)的解析式为________.
对任意实数\(x \)均有\({e}^{2x}-\left(a-3\right){e}^{x}+4-3a > 0 \),则实数\(a \)的取值范围为__________\(.\)
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