Posted by andy on Thursday, September 23, 2010 at 2:06pm.
To answer these questions, you need to find the answers to two questions:
1. what is the domain of f(x), and
2. what is the range of f(x).
To find the domain of f(x), you will observe what values of x will render f(x) undefined (±∞, etc) or complex (i.e. square-root of a negative number).
Armed with the results, you can then check them against your answers, the majority of which are, unfortunately, incorrect.
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