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Find f(-1) for the function below.f(x)= 4x if x _< -1 x-2 if x > -1

User Crosswired
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We need to determine the value of the function when x is equal to -1, for the function below:


f(x)=\begin{cases}4x\text{ for }x\le-1 \\ x-2\text{ for }x>-1\end{cases}

The value of x is equal to -1, therefore we need to use the first expression:


\begin{gathered} f(x)=4x \\ f(-1)=4\cdot(-1) \\ f(-1)=-4 \end{gathered}

The function is equal to -4 when x is equal to -1.

User Golo Roden
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