Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2011 | Oct-Nov | (P2-9709/23) | Q#1

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Find the gradient of the curve y = ln(5x + 1) at the point where x = 4.


Gradient (slope) of the curve is the derivative of equation of the curve. Hence gradient of curve with respect to  is:


Rule for differentiation natural logarithmic function , for  is;

Gradient (slope) of the curve at a particular point can be found by substituting x- coordinates of that point in the expression for gradient of the curve;

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