To find:the values of the variable for which the given expression is defined as real number.
The given expression is .
Guidelines for solving nonlinear inequality:
The domain of is greater than or equal to 0.
Thus, the factor is
First to find the zeros of the expression in the numerator and demniminator, then
From the three zeros above, it extracts the following intervals:
Now, make a table by using test values of the signs of each factor on each interval.
As it is seen that the solution set is greater than or equal to 0.
Hence, the solution set is .
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