This video deals with how to work with arithmetic sequences with a 'common difference.' This is where  the same number is added, or subtracted, each time. For instance the sequence 12, 16, 20, 24, 28 .... has a common difference of  add 4 ...... or 16, 8, 0, -8, -16 has a common difference of subtract 8. How to work out arithmetic sequences and value of nth term. GCSE grade C … [Read more...]