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Mathematics 14 Online
OpenStudy (anonymous):

Explain Irrational numbers and give a few examples Thanks!

OpenStudy (inkyvoyd):

A rational number is a number that can be expressed as the ratio of two integers. For instance, 0.5 is a rational number, which is 1/2

OpenStudy (inkyvoyd):

0.394 repeating can be expressed as 394/999

OpenStudy (anonymous):

ok so how many irrational numbers are from 1-10?

OpenStudy (anonymous):

Im studying for my ACT test tomorrow

OpenStudy (inkyvoyd):

However, in the defined "real number set", not all numbers can be expressed as the division of two integers. Although historically it took a bit of time for us to accept this, a simple proof of the the fact that \(\sqrt{2}\) is irrational is suffice

OpenStudy (inkyvoyd):

There are an infinite number of rational AND irrational numbers between 1-10...

OpenStudy (anonymous):

give me an example why please

OpenStudy (inkyvoyd):

Well, pick two numbers between 1 and 10.

OpenStudy (anonymous):

2 and 7

OpenStudy (inkyvoyd):

Pick two numbers in between those two.

OpenStudy (anonymous):

5, 6

OpenStudy (inkyvoyd):

Now do it again.

OpenStudy (anonymous):

5.6, 5.7

OpenStudy (inkyvoyd):

an important property of the real numbers is that they are continuous - in a sense, there are an INFINITE "number" of numbers in between any two different numbers, no matter how small the difference

OpenStudy (inkyvoyd):

There are actually "far more" irrational numbers than rational numbers.

OpenStudy (anonymous):

so in 1-3 there is many aswell?

OpenStudy (inkyvoyd):

Well, comparing the two expressions is indeterminant I believe

OpenStudy (anonymous):

Great! Thanks a lot for your help it cleared my confusion. Hopefully I get this right on one of the biggest tests of my life!

OpenStudy (inkyvoyd):

@Marlins0412 , the key thing to know is that there are an infinite number of rational and irrational numbers

OpenStudy (inkyvoyd):

rational numbers can be expressed as the division of two integers, while irrational numbers cannot

OpenStudy (anonymous):

I see

OpenStudy (anonymous):

WEll off to more studying thanks again

OpenStudy (inkyvoyd):

yes - good luck!

OpenStudy (anonymous):

Thanks so much!

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