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When dealing with with mixed fraction operations, the first step is always to change the mixed fraction into a top heavy fraction. Then consider weather the question is a multiplication, divsion, addition or...

We can solve this pair of simultaneous equations using substitution. To do this, we firstly have to rearrange one equation to get one variable on its own. For example, we can subtract 2y from each side of th...

First we follow the "times by the power and take one from the power" rule. This is the easiest way to remember how to differentiate anything. So (3x4)x (4-1) -(2x2)x (2-1) +(9x1)x (1-1) -(1x0)x (0-...

If m=a x n=a y and a 2 =(m y n x ) z Show xyz=1. The above question is an indices question from an AS textbook. This is question 7 so I will tell you now that this is perhaps a higher difficulty question but...

The integration by parts formula: S:u dv/dx = u v - S:v*du/dx, where S: means "Integral of with respect to x" Let 2*x be u and sin(x) be dv/dx So du/dx =2 and v= -cos(x) So S:(2 x) sin(x) = (2 x) (...