(0, infinity) Note that you should use the infinity sign instead of the word (the sideways 8).
0 < x < +INF is the same as: (0, +INF)
Interval notation is a method of writing down a set of numbers. An example of this is all numbers that are greater than five.Ê
22=
you write the number infinity like an eight on its side
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Positive: (0, infinity)Nonnegative: [0, infinity)Negative: (-infinity, 0)Nonpositive (-infinity, 0]
0 < a < ∞
0 < x < +INF is the same as: (0, +INF)
That is, 0
Interval notation is a method of writing down a set of numbers. An example of this is all numbers that are greater than five.Ê
480,000,000
A more formal definition for a number less than 20 could be, "a number x, x < 20" or if you want to express the set of all numbers less than 20 "{x | x < 20}" which is read "the set of all numbers x such that x is less than 20". In interval notation, you can write (-infinity, 20) where "infinity" should be replaced by the infinity symbol.
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22=
you write the number infinity like an eight on its side
8.73E4, scientific notation involves a number from 1 to 9 and the appropriate exponernt of ten represented by 'E". the exponent can be positive or negative.
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