SOLUTION: find explicit formula for the nth term of the sequence with initial terms. a) 3,6,12,24,48 b)4/9,-8/27,16/81,-25/243

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Question 1069387: find explicit formula for the nth term of the sequence with initial terms.
a) 3,6,12,24,48
b)4/9,-8/27,16/81,-25/243
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
a) first term = 3, common ratio = 2

a_n = 3%282%29%5E%28n-1%29

b) first term = 4/9, common ratio = -2/3

a_n = %284%2F9%29%28-2%2F3%29%5E%28n-1%29