SOLUTION: The third of sequence is 48. The term - to - term rule is, 'subtract 2 then multiply by 3.' What is the first term of the sequence?

Algebra ->  Sequences-and-series -> SOLUTION: The third of sequence is 48. The term - to - term rule is, 'subtract 2 then multiply by 3.' What is the first term of the sequence?       Log On


   

Question 984595: The third of sequence is 48. The term - to - term rule is, 'subtract 2 then multiply by 3.' What is the first term of the sequence?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A%5B3%5D=%28A%5B2%5D-2%29%2A3
A%5B2%5D=%28A%5B1%5D-2%29%2A3
So starting with A%5B3%5D=48
48=%28A%5B2%5D-2%29%2A3
A%5B2%5D-2=16
A%5B2%5D=18
Then,
18=%28A%5B1%5D-2%29%2A3
A%5B1%5D-2=6
A%5B1%5D=8