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Geometry 13 Online
OpenStudy (anonymous):

ged help with rational numbers

OpenStudy (unklerhaukus):

\[\large x\in\mathbb Q\]

OpenStudy (unklerhaukus):

what help do you neeed exactly

OpenStudy (unklerhaukus):

\[x\in\mathbb Q \implies x=\frac ab\Big|a,b\in\mathbb Z\land b\neq0\]

OpenStudy (unklerhaukus):

a rational number can be written in the form of a fraction, where the numerator and denominator are integers, and the denominator is not zero

OpenStudy (anonymous):

I need help learning what a rational number is.....

OpenStudy (unklerhaukus):

do you know what an integer is?

OpenStudy (unklerhaukus):

integers are number you can count, like ...., -3, -2, -1, 0, 1, 2, 3, ....

OpenStudy (unklerhaukus):

rationals can be written as a/b if a and b are both integers , and b is not zero

OpenStudy (anonymous):

thank you

OpenStudy (unklerhaukus):

so 3/5 is rational, so is -4/27, 1/1, 400/3, -894/23

OpenStudy (unklerhaukus):

numbers like √2, e, π, i , are not integers and cannot be expressed as ratios of integers so they are not rational numbers

OpenStudy (anonymous):

how is -894/23 a rational number

OpenStudy (unklerhaukus):

√9 is rational because you can write it as √9 = √(3*3) = 3 = 3/1 12π/15 is not rational because even though it does simplify = 4π/5 you wont be able to get the π factor out

OpenStudy (unklerhaukus):

-894/23 is rational because -894 is an integer, so is 23, and 23 is not 0

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