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Differentiability and Continuity XII by api-233084441 is a document available to read on EtoBox.
(1) If f(x) = x2 + 9, then the limit of (f(x) - f(4))/(x - 4) as x approaches 4 is 4/5. (2) The derivative of tan-1(cotx) + cot-1(tanx) with respect to x is 0. (3) If y = ex - e-x/(ex + e-x), then dy/dx is y2 - 1.
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