SOLUTION: if r=-3 and a5= 486 what is the first item in the sequence

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Question 860737: if r=-3 and a5= 486 what is the first item in the sequence
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Tn = t1 * r^(n - 1)
486 = t1 * (-3)^(4)
t1 = 6