SOLUTION: Can i get the recursive equation for 1 , -2 , 4 , -8, 16 ? It would help a lot if i could get it as soon as possible!!!

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Question 1048108: Can i get the recursive equation for
1 , -2 , 4 , -8, 16 ?
It would help a lot if i could get it as soon as possible!!!
Answer by ikleyn(52847) About Me  (Show Source):
You can put this solution on YOUR website!
.
Geom. progression,
first term 1,
the common difference -2.


a%5Bn%2B1%5D = %28-2%29%2Aa%5Bn%5D, n = 1, 2, 3, . . . 


General term  a%5Bn%5D = 1%2A%28-2%29%5E%28n-1%29 = %28-2%29%5E%28n-1%29 = %28-1%29%5E%28n-1%29%2A2%5E%28n-1%29.