Sigma Notation worksheets
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-9 < x ≤ -4
x < 8
Can you use the symbols "[" or "]"
with infinity?
Yes
No
Which of the following numbers is not in the interval (3, 9]?
3
3.14
7
9
When graphing an inequality, you use an open dot when you use which symbol?
<, >
≤, ≥
>, ≥
<, ≤
-9 < x < -8.5
6 > x
Which is the closest to " [ a, b) "
All values between a and b, including both a and b
All values between a and b, excluding both a and b
All values between a and b, including a, but excluding b
All values between a and b, including b, but excluding a
Why do we not use closed parentheses/brackets for positive and negative infinity?
Infinity is an idea/concept and not an actual number, so it can't be included
False, we do in fact use closed parentheses/brackets for positive and negative infinity
Huh?
???
(-7, 15]
What inequality is graphed?
2 < x < 4
2 ≤ x ≤ 4
x > 2 or x < 4
x ≥ 2 or x ≤ 4
Which graph matches the inequality
4 > x
A
B
C
D
x > 6 and x ≤ 10
x ≥ 100
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