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Show 3 root 7 is an …

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Show 3 root 7 is an irrational no.

    • Posted by Rohan Kumar 7 years, 6 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Vidhi Jain 7 years, 6 months ago

    let us take on contrary that 3 root 7 is rational. then there exist two co prime numbers a and b such that 3root 7 = a/b => root 7 = a / 7b now LHS is an irrational no. whereas RHs is rational this contradiction has arised due to our wrong assumption in beginning therefore 3 root 7 is an irrational number

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