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Mind Expander
To find the domain of the function
, we need to ensure that the expressions under the square roots are non-negative. For the square root in the numerator
to be defined,
must be greater than or equal to 3. For the square root in the denominator
,
must be strictly greater than 6 (since division by zero is not allowed). Therefore, the domain of the function is
in the interval
.
Also, when evaluating such functions, be cautious! A common mistake is overlooking the restriction that arises from the denominator. Always remember that the domain can be affected by both the numerator and the denominator, and check for the possibility of valid input values before jumping into function evaluations.