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in Continuity and Differentiability by (31.3k points)
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If f is continuous at x = 0, then find f(0)

\(f(x) = \frac{cos\,3x - cos\,x}{x^2}, x \neq 0\)

f(x) = (cos 3x - cos x)/(x2), x ≠ 0

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Best answer

f(x) = (cos 3x - cos x)/(x2)

Given, f is continuous at x = 0

\(\therefore\) f (0) = –4

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