(1). (8%) Find the second difference for the function \( f''(x) \) for \( f(x) = 0 \), if \( x = 0 \); \( f(x) = \frac{1 - \cos x}{x} \), if \( x \neq 0 \).
阿摩線上測驗
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(1). (8%) Find the second difference for the function \( f''(x) \) for \( f(x) = 0 \), if \( x = 0 \); \( f(x) = \frac{1 - \cos x}{x} \), if \( x \neq 0 \).