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What is the irrational number in This set: 12.89, square root of 12 and 12/144 ?


Sagot :

Illuminati750
Good night, 

Irrational numbers are those that can't be expressed as a fraction:

12.89 can be expressed as: [tex] \frac{1289}{100} [/tex]

[tex] \frac{12}{144}= \frac{1}{12} [/tex]

The above numbers can be expressed as a fraction, then the logical answer is: [tex] \sqrt{12} [/tex]

But we will check the answer: 

[tex] \sqrt{12}= \sqrt{2^{2}*3 } =2* \sqrt{3} =3.4641016...[/tex]

As you can see we can't express that number as a fraction, so that is te correct answer.

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