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I tried my best but I can't seem to get it

I tried my best but I can't seem to get it-example-1
User EricM
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1 Answer

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Given


f(x)=\begin{cases}2x+4;{x<0} \\ 2x+8;x\ge0{}\end{cases}

Therefore,


\begin{gathered} -1<0 \\ \Rightarrow f(-1)=2(-1)+4=-2+4=2 \\ \Rightarrow f(-1)=2 \end{gathered}

Similarly,


\begin{gathered} 0\ge0 \\ \Rightarrow f(0)=2(0)+8=8 \\ \Rightarrow f(0)=8 \\ 2\ge0 \\ \Rightarrow f(2)=2(2)+8=4+8=12 \\ \Rightarrow f(2)=12 \end{gathered}

The answers are f(-1)=2, f(0)=8, f(2)=12

User Sebyddd
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