\( ( n ) f ( x ) = \left\{ \begin{array} { l l } { \cos \frac { \pi x } { 2 } } & { | x | \leq 1 } \\ { | x + 1 | } & { | x | > 1 } \end{array} \right. \)
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The Deep Dive
Did you know that piecewise functions like the one you've presented often arise in real-world situations? For example, they can model scenarios where a situation changes based on a specific condition, like a speed limit that varies depending on whether you're in a residential area or a highway. In this case, the function smoothly transitions from a cosine wave within the interval [-1, 1] to a linear function outside of that range, adapting to different contexts. When working with piecewise functions, common pitfalls include forgetting to check the continuity at the intervals’ boundaries. In your case, it's crucial to ensure that \( f(x) \) aligns at \( x = 1 \) and \( x = -1 \) so that the function behaves well across its domain. Make sure to evaluate the left-hand and right-hand limits at these points to avoid any unexpected jumps!