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secondary 4 | A Maths
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Can help to explain why the solution is to find dy/dx?.. what is the purpose of indicating that the equation of the normal to curve is x=k when we are not asking to find k? Thks
Date Posted: 1 year ago
Views: 186
Note that x=k is a vertical line. If the normal is vertical, then the tangent must be horizontal. So this is just an indirect (& clever!) way of telling you to find x where dy/dx=0. The value of k is immaterial here.
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