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shayshayglee5

  • 3 years ago

What is one example of an irrational number and a rational number?

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  1. FaisalAyaz
    • 3 years ago
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    A rational is a number which could be written in the form of p/q or fraction. For Example \[\sqrt{4}\] = 2 which is understood 4/1. So \[\sqrt{4}\] is a rational number and \[\sqrt{3}\] is an irrational number.

  2. FaisalAyaz
    • 3 years ago
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    u got it?

  3. ivanmlerner
    • 3 years ago
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    To prove that a number is irrational we usually assume it is rational and then prove it leads to a contradiction.

  4. cwrw238
    • 3 years ago
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    also a rational number can be written as a fraction e.g. 2/3 whereas an irrational cannot many square roots are irrational like sqrt2 , sqrt5, sqrt7

  5. ivanmlerner
    • 3 years ago
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    Any squareroot of a prime is irational

  6. cwrw238
    • 3 years ago
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    right - also square root of some even numbers like 8, 12

  7. ivanmlerner
    • 3 years ago
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    That you get by writing those numbers as a multiplication of primes: 8=2*2*2, 12=2*2*3 and what is left in the squareroot is a prime, therefore irrational

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