Hailey M.

# Compute the domain of the function

Compute the domain of the function f(x)= ax−15 in terms of a. Assume a>0. Answer with an interval, i.e. [0, infinity), or unions of intervals, i.e. (-infinity,1]U(6,9), or answer simply with an inequality, i.e. x<=-10.

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Hailey M.

how would the answer change if the "ax-15" were under a radical ?
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09/07/18

Paul M.

tutor
Then the domain would be x greater than or equal to 15/a since if x were less than that the expression under the radical would be negative (assuming you are considering only real-valued functions).
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09/07/18

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