输入问题...
三角学 示例
解题步骤 1
Set the argument in less than to find where the expression is undefined.
解题步骤 2
Set the argument in greater than to find where the expression is undefined.
解题步骤 3
方程在分母等于 时无定义,平方根的自变量小于 或者对数的自变量小于或等于 。
解题步骤 4