4. Prove that $f(x) = x^2 - 1$ is continuous at $c = 0$ by any method other than the graphing method.
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Step 1: To prove that f(x) = x^2 - 1 is continuous at c = 0, we need to show that the limit of f(x) as x approaches 0 exists and is equal to f(0). Show more…
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