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jamarian101
12.08.2020 •
Mathematics
Find the first, fourth, and eighth terms of the sequence. A(n) = −5 ∙ 2x − 1
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Ответ:
Step-by-step explanation:
The rule for the sequence is
where x is the number of terms
For the first term
x = 1
That's
A(1) = 5(1)
A(1) = 5For the fourth term
x = 4
A(4) = 5(8)
A(4) = 40For the eighth term
x = 8
A(8) = 5(128)
A(8) = 640Hope this helps you
Ответ:
The first option.
Step-by-step explanation:
The first term of the sequence would be...
A(1) = -5 * 2^(1 - 1)
= -5 * 2^0
= -5 * 1
= -5
The fourth would be...
A(4) = -5 * 2^(4 - 1)
= -5 * 2^3
= -5 * 8
= -40
The eighth would be...
A(8) = -5 * 2^(8 - 1)
= -5 * 2^7
= -5 * 128
= -640
So, the correct answer is the first option.
Hope this helps!
Ответ: