C3 coordinates of turning point question

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username2982648
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Report Thread starter 4 years ago
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I am really confused about part (d) because the mark scheme equates dy/dx to zero, but I remember from C2 that you had to equate the second order differential to zero to do this kind of thing?

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Shaanv
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When dy/dx=0 u can find the turning points on a graph. The second order differential is a way of checking whether or not the turning point is a maximum or a minimum.

You just got tye two confused. Good luck
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