SOLUTION: The first term is -140. Each term is equal to the previous term multiplied by a common ratio. The common ratio is 0.5. what would the term value be for the 20th term?

Question 1206361: The first term is -140. Each term is equal to the previous term multiplied by a common ratio. The common ratio is 0.5. what would the term value be for the 20th term?
Found 2 solutions by math_tutor2020, greenestamps:
Answer by math_tutor2020(3817) (Show Source): You can put this solution on YOUR website!

The sequence is geometric.
a = -140 = first term
r = 0.5 = common ratio

= nth term of a geometric sequence, where n is a positive integer (1,2,3,4,...)

approximately depending how you round it

Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

The n-th term is the first term, multiplied by the common ratio (n-1) times.

= -0.000267 to 3 significant figures.

The other tutor shows the right answer, but the calculations are not showing correctly... might be a problem with the algebra.com website.

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Oh... now I see his response is displaying correctly....

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