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e^x=u-1 so e^3x=(u-1)³ and du/dx = e^x so rearranging gives dx=e^-x du Substituting all that information in the integral we get Integral ( (u-1)^...

Price elasticity of demand (PED) is defined as % change in quantity demanded / % change in price. This is also the slope of the demand curve. If PED is less than 1, we say that the demand for the good is ...

The introduction is often seen as an annoying hurdle, but it is crucial in giving the marker a strong first impression. Writing an unclear intro that considers a few possible arguments or approaches but d...

as there are 25 CD's in one box, then we would multiply by 14 to know the total number of CD's, we use multiplication as it is quicker than adding 25 14 times. I would then show the column multiplication ...

A good introduction is clear, concise, and shows the examiner that you have a firm grasp on the relevants concepts and material. I always start my introductions by setting out in a single sentence the mai...