Find the first, fourth, and eighth terms of the sequence. A(n) = −5 ∙ 2x − 1
2 answers:
Answer:
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!
Answer:
<h3>The answer is option A</h3>
Step-by-step explanation:
The rule for the sequence is

where x is the number of terms
<u>For the first term</u>
x = 1
That's


A(1) = 5(1)
<h3>A(1) = 5</h3>
<u>For the fourth term</u>
x = 4


A(4) = 5(8)
<h3>A(4) = 40</h3>
<u>For</u><u> </u><u>the</u><u> </u><u>eigh</u><u>th</u><u> term</u>
x = 8


A(8) = 5(128)
<h3>A(8) = 640</h3>
Hope this helps you
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