Answers

2016-07-25T18:09:07+08:00
-12.5, -7,-1.5 and the difference is 5.5 
0
can you show the solution?
An=Asub1 + (n-1)d
4=-18+(5-1)d --> 4+18=4d -->22=4d --> 22/4=4d/4--> 5.5
-18+5.5= -12.5; -12.5+5.5=-7; -7+5.5=-1.5