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anonymous

  • one year ago

one more question about irrational numbers.

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    Its is 4 Because Pi, is already stated as an irrational number already. without calculation

  3. anonymous
    • one year ago
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    I have to figure out if each one is irrational or rational

  4. mathmath333
    • one year ago
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    a rational number can be written as \(a/b\) where a and b are integers

  5. phi
    • one year ago
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    another clue is if you write the number as a decimal, you can predict the digits. for example, pi is irrational because we have to calculate each digit in its decimal. Knowing pi= 3.14159 does not tell us what the next digit is. (People have calculated this out to millions of digits... no pattern) on the other hand 1/7 = 0.142857142857142857... (it keeps repeating 142857...) that means it is rational

  6. phi
    • one year ago
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    almost all "roots" (example sqrt(2) ) are irrational except for perfect squares such as sqrt(4) = 2.0 (and here we know its decimals.. all 0's)

  7. phi
    • one year ago
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    so if you see a fraction of integers, it is rational if you see an irrational number times or divided by a nice number, it stays irrational the only time I can think of to get a rational number from irrationals is if we see for example, \[ \frac{\pi}{\pi} = 1 \]

  8. anonymous
    • one year ago
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    so my answers I got was 1=rational 2=irrational 3=rational 4=irrational

  9. phi
    • one year ago
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    yes, looks good

  10. anonymous
    • one year ago
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    ok thank you

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