SOLUTION: What is the pattern -3, 6, -9, 12

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Question 1047716: What is the pattern -3, 6, -9, 12
Answer by Boreal(15235) About Me  (Show Source):
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It is (-1)^n*3n
n=1, and have -3
n=2 and have 6
odd n s make negative numbers
the next number will be -15, then 18.