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Mathematics 11 Online
OpenStudy (anonymous):

The diagram shows a curve for which \[{dy \over dx}= {- k \over x^3}\] where k is a constant. The curve passes through the points (1, 18) and (4, 3). (i) Show by integration, that the equation of the curve is \[y={16 \over x^2} +2\]

OpenStudy (anonymous):

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