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如何确定导数(函数)的符号众所周知,我们可以根据导数的符号判断函数的单调性.导数大于零,函数单调递增;导数小于零,函数单调递减.因此,判断导数的符号成为利用导数
How to Determine the Sign of a Derivative (Function) As we all know, we can judge the monotonicity of a function based on the sign of the derivative. The derivative is greater than zero and the function monotonically increases. The derivative is less than zero and the function decreases monotonically.