What is the next number in the pattern: -405, -135,-45, 15?

1 Answer
Annie
Aug 28, 2016

Should the last term be -15?
If so th5th term is -5

Explanation:

-405,-135,-45,-15 or

15x-27:15x-9:15x-3:15x-1 or

15x#-3^3#:15x#-3^2#:15x#-3^1#:15x#-3^0#
So the next term is 15x#-3^-1# =-5
And the next 15x#-3^-2# =#-5/3#

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