The wording of this question is a bit confusing... You can't write a sequence in sigma notation, but rather a series or sum. I think the question is asking you to write the sum of the sequence,

which would be

in sigma notation.
To do this, notice that the denominator in each term is a power of 2, starting with
and ending with
. So in sigma notation, this series is

Answer:
X=-3
Step-by-step explanation:
5x - 9
-2x + 12
(+) (-)
7x = -21
X= -3
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Answer:
Because it is acorrding to question answer
Answer:
2 is your answer. hope helpful answer
Answer:
d.
Step-by-step explanation:
The absolute value of a negative makes it a positive so |-3| is actually just 3