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3 years ago

What is the explicit formula for the sequence below? 4, -12, 36, -108 ...

Mathematics

1 answer:

Temka [501]3 years ago

4 0

Answer:

This is a geometry sequence (I.e each term is found by multiplying the same value to the previous term).

T1 = 4

T2 = -12 = T1 X (-3) = 4 X (-3)

T3 = 36 = T2 X (-3) = 4 X (-3)^2

T4 = 108 = T3 X (-3) = 4 X (-3)^3

The general (explicit) formula for the n-th term of this sequence is:

S(n) = 4 X (-3)^(n-1)

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The projected world population (in billions of people) t years after

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Answer:

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2 years ago

Read 2 more answers

What does x equal ?

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3 years ago

45. For customers generating their own solar power, ZG&E charges them $3 per month per kilowatt (kWh) for excess electricity

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$300kWh\times\frac{\$3}{1kWh}=\$900$

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$\$20+(300kWh\times\frac{\$0.06}{1kWh})=\$38$

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11 months ago