#27 Grade C 
revise! 

try a random GCSE question...  

a) The n^{th} term of a sequence is 7n  4  
Write down the 4^{th} term.  
Write down the 10^{th} term.  
b)
The first 4 terms of a different sequence are: 9, 13, 17, 21 Find an expression for the n^{th} term of the sequence. 

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