anonymous
  • anonymous
one more question about irrational numbers.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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anonymous
  • anonymous
Its is 4 Because Pi, is already stated as an irrational number already. without calculation
anonymous
  • anonymous
I have to figure out if each one is irrational or rational

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mathmath333
  • mathmath333
a rational number can be written as \(a/b\) where a and b are integers
phi
  • phi
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
phi
  • phi
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)
phi
  • phi
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, \[ \frac{\pi}{\pi} = 1 \]
anonymous
  • anonymous
so my answers I got was 1=rational 2=irrational 3=rational 4=irrational
phi
  • phi
yes, looks good
anonymous
  • anonymous
ok thank you

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