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The equation of a curve is x(y^2)=x^2 +1 . Using the differential, find the coordinates of the stationary point of the curve.

Firstly we need to use product rule to find the dy/dx of the left hand side (LHS). Using implicit differentiation, we know the differential of y^2 is 2y(dy/dx). Then use to product rule to obtain the dy/dy o...
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Answered by Grace C. • Maths tutor
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Where do the kinematics equations (SUVAT) come from?

mathematical derivation
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Answered by Kunal P. • Maths tutor
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How do I differentiate a quadratic to the power n?

To do this we will use the chain rule, whereby dy/dx = dy/du * du/dx. So if y = (ax^2+bx+c)^n then we will say that u = ax^2+bx+c. Therefore y =u^n. So to find dy/dx we differentiate u with respect to x, whi...
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Answered by Alex A. • Maths tutor
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Given that f(x) = (x^2 + 3)(5 - x), find f'(x).

First we must multiply out the brackets, using FOIL (first, outer, inner, last). This gives f(x) = -x^3 + 5x^2 - 3x + 15. Alternatively you could leave the brackets as they are, and use the product rule to d...
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Answered by Chris D. • Maths tutor
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Why do we need to differentiate?

Differentiation is a very important tool for mathematicians. Although finding the gradient of a line can seem to lack a point, it does have some very important applications. For example, in mechanics the vel...
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Answered by Andrew G. • Maths tutor
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