gdavila817 gdavila817

26-07-2020
Mathematics

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what is the 8th term of the geometric sequence with this explicit formula

what is the 8th term of the geometric sequence with this explicit formula class=

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folarin7 folarin7

26-07-2020

Answer: 640 (B)

Step-by-step explanation:

The explicit formula

an = -5 × ( -2 )(n - 1) bearing in mind that n = 8

Therefore, putting n = 8 - 1, = 7

-5 × -2(7) raised to the power of 7

an = -5 × -128

= 640

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