13. Copy and complete the following table. g(x) f(x) (f \circ g)(x) a. x - 7 $\sqrt{x}$ ? b. x + 2 3x ? c. ? $\sqrt{x - 5}$ $\sqrt{x^2 - 5}$ d. $\frac{x}{x - 1}$ $\frac{x}{x - 1}$ ? e. ? $1 + \frac{1}{x}$ x f. $\frac{1}{x}$ ? x
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