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Show that 7-√5is irrational give that …

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Show that 7-√5is irrational give that √5is irrational

    • Posted by Rishabh Raj Singh 5 years, 8 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Aryan Beniwal 7 years ago

    Seven underroot 5 Put equal to a/b so Now underroot 5 is equal to a/7b Therefore a/7b is rationl no So 5 also is a rational no But this contradict that underroot 5 is irrrational So ,our assumption is wrong and 7 underroot 5 is irrational no

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