Rule for pattern r: start with 60. subtract 6 to get the next term.
60, 54, 48, 42, 36
ques: write an expression you can use to generate the first five terms of pattern r

     This is an arithmetic progression. The general term of an arithmetic progression is given by:


 
     Where "n" indicates the position and "r" is the ratio of progression. Therefore:



If you notice any mistake in my english, please let me know, because i am not native.