+0  
 
+2
63
2
avatar+62 

Let \[f(x) = \left\{
\begin{array}{cl}
x^2+1 &\text{ if }x>5, \\
2x-3 &\text{ if } -5 \le x \le 5, \\
3 &\text{ if } x <-5.
\end{array}
\right.\]

 

Find $f(-7)+f(0)+f(7)$

 Aug 13, 2021
 #2
avatar+114539 
+2

-7 is less than -5 so   f(-7)=3

 

You can try the other 2    laugh

 Aug 13, 2021

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