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How to find y-intercept on a graphical calculator

Your graphical calculator is your best friend. Never leave home without it, providing you're going to a class or an exam. Using graphs we can work out intercepts; solve simulatneous equations and help you ou...
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Answered by Emily H. • Maths tutor
7064 Views

How to gain an inverse function

Set f(x) = y. Then rearrange your equation to find x on it's own as some function of y. If you have a x term on both the top and bottom of a fraction then you will have to multiply the whole equation through...
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Answered by William S. • Maths tutor
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What is the chain rule, product rule and quotient rule and when do I use them?

The chain rule, product rule and quotient rule are all 3 methods of differentiating complex functions. Chain rule The chain rule is as follows: (dy/dx) = (dy/dz).(dz/dx) or D{f(g(x))}/dx = f'(g(x)).g'(x) The...
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Answered by Hakeem K. • Maths tutor
13231 Views

How do I calculate the rate of change of something for which I don't have an equation?

This kind of question is an application of differentiation. If t represents time, any derivative with respect to t is a rate of change. For example, if h represents the depth of water in a cubicle container,...
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Answered by Sam E. • Maths tutor
18352 Views

How can we determine stationary points by completing the square?

Suppose we have completed the square on y=ax^2+bx+c and attained y=a(x+p)^2+q, where a,b,c,p,q are real numbers with 'a' not equal to zero and p,q can be expressed in terms of a,b,c. For a>0 we have a min...
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Answered by Hayk Y. • Maths tutor
16370 Views