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(4-x)^-1/2 = (4 (1 - x/4))^-1/2 = 1/2 (1 - x/4)^-1/2 = 1/2 ( 1 + x/8 + 3x²/128 + ...) = 1/2 + x/16 + 3x²/256 + ...Therefore the first three ter...

Refer to question taken from Edexcel Maths Paper.

with quadratic equations you will either get two x values for your answer, one value or zero values. This can be tested by rhe value of your discriminant when values have been subbed in. If it’s greater t...

There a 60 minutes in one hour.There are 60 seconds in one minute.60 multiplied by 60 is 3600.Therefore the plane travels 213 miles in 3600 seconds.To find out how many seconds it takes the plane to trave...

In my experience practice makes perfect and the best way to do this is to immerse yourself with as much past papers as you can do. Maths is maths so don't be afraid to check other exam boards for their pa...