A right angled triangular pen is made from 24 m of fencing, all used for sides [AB] and

Chapter 17, Problem 17

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A right angled triangular pen is made from 24 m of fencing, all used for sides [AB] and [BC]. Side [AC] is an existing brick wall. a If AB = x m, find D(x) in terms of x. b Find d[D(x)]2 dx and hence draw its sign diagram.

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