SOLUTION: Hi there, Im looking to find the sum of the first four terms of this sequence -18,9,-9/2

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Question 957770: Hi there, Im looking to find the sum of the first four terms of this sequence
-18,9,-9/2
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
Multiply each term by -1/2:
36(-1/2)=-18
-18(-1/2)=9
9(-1/2)=-9/2
-9/2(-1/2)=9/4
9/4(-1/2)=-9/8
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