Question
Let $f(x)=\left\{\begin{array}{cll}x+3 & \text { if } & x \geq 5 \\ 8 & \text { if } & x<5\end{array}\right.$Find $f(12)-f(-12) .$
Step 1
Since $12 \geq 5$, we use the first function $f(x) = x + 3$. Substituting $x = 12$ into the function, we get $f(12) = 12 + 3 = 15$. Show more…
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