Find the value of x if any at which f is not continuous

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Reference no: EM131005708

Find the value of x, if any, at which f is not continuous.

1. f(x) = 5x⁴ - 3x + 7

2. f(x) = ³√(x - 8)

3. f(x) = (x + 2) / (x² + 4)

4. f(x) = (2x + 1) / (4x² + 4x + 5)

Reference no: EM131005708

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