0.5,1.5,4.5,13.5,...

what is the next three terms???
plz help

8 answers

If you double it..

1,3,9,27
which is the sequence of 3^n, n=1,2,3,4,..

so you want half of that.
What is 3x3x3x3 for the next term, then take half.
I noticed this pattern

1.5-.5 = 1
4.5-1.5 = 3
13.5 - 4.5 = 9

suggesting that the differences could be powers of 3, so the next difference is 27, then 81 etc.

try that.
huh?
thank you so much!
well my teacher said to find out what this sequece ment and who was the man who invented it .it goes like 1,1,2,3,5,8,13,21 ............... and i have got to find out the rest too the last number
plese help me
find the next three terms of each sequence
0.5 1.5 4.5