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nevsk [136]
3 years ago
11

What is the 8th term of the geometric sequence 4, −20, 100, …?

Mathematics
1 answer:
Verizon [17]3 years ago
8 0
First term a= 4, 
Common ratio, r=-20/4=-5
nth term =ar^{n-1}
The 8th term is thus;
4-5^{8-1}
=4*(-78125)
=-312500
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<u>Corrected Question</u>

In the year 2009, the cost of a flat screen television can be  modeled by the equation C = -10t^2 + 500 where t is the  number of years since 2009. Factor this cost polynomial.

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