What is the recursive rule for the sequence?
−7.4, −21.2, −35, −48.8, −62.6, ...
an=an+1+13.8 , where a1=−7.4
an=an+1−13.8 , where a1=−7.4
an=an−1+13.8 , where a1=−7.4
an=an−1−13.8 , where a1=−7.4
Looks like the difference between terms is -48.8 - (-35) = -48.8 + 35 = -13.8
So.......
an = an-1 - 13.8 , where a1 = - 7.4
[ Remember that an is the term after an-1 ]
+476 
