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To find the turning points we need to find dy/dx and set it equal to zero. From there we can find the x coordinate and substitute it back into the origional equation to find the y coordinate.

English revision can be daunting because your teacher can't give you a list of facts to memorise. However, there's still lots you can do to make sure you go into the exam ready and confident!

Although English literature exams can seem daunting, there are plenty of revision steps you can take in order to set yourself up for success.

After you have familiarised yourself with you...

Anaerobic respiration occurs when there is no oxygen available and so produces an oxygen debt. This debt is equivalent to the total amount of oxygen required to oxidise the lactic acid formed from this...

Leaching is the process by which nitrates and other organic molecules can reach lakes from fields. This may be due to a large amount of fertiliser being applied or heavy rain causing the fertiliser to was...