SOLUTION: Please help me solve this sequence problem from Elementary and Intermediate Algebra. Write a formula for the general term of the infinite sequence. -1,2,-4,8,16,...

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Question 209792This question is from textbook Elementary and Intermediate Algebra
: Please help me solve this sequence problem from Elementary and Intermediate Algebra. Write a formula for the general term of the infinite sequence.
-1,2,-4,8,16,... This question is from textbook Elementary and Intermediate Algebra

Answer by tutor_paul(519) About Me  (Show Source):
You can put this solution on YOUR website!
Upon inspection of the sequence, you will notice that each number is the product of the previous number and -2. So you can write the formula for any term as:
highlight%28an=-2a%28n-1%29%29
Note that the 'n' and '(n-1)' terms in the equation are written as subscripts to the a... I just can't do that here.
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Good Luck,
tutor_paul@yahoo.com