. व्यापार के आयात प्रतिस्थापन नीति किसे कहते हैं
अथवा
भारतीय योजनाओं के निर्माता महालनोबिस को
2. अपनी कक्षा के 10 छात्रों में से तीन को चुनने के लिए
करेंगे? चर्चा कीजिए।
अथवा
इनमें से कौन सी विधि द्वारा बेहतर परिणाम प्रा
1. गणना
2. प्रतिदर्श
Answers
Answered by
13
Answer:
प्रतिशत
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Answered by
7
Explanation:
Question : Prove that√5 is irrational.
Answer :
Let us assume that √5 is a rational number.
Sp it t can be expressed in the form p/q where p,q are co-prime integers and q≠0
⇒√5=p/q
On squaring both the sides we get,
⇒5=p²/q²
⇒5q²=p² —————–(i)
p²/5= q²
So 5 divides p
p is a multiple of 5
⇒p=5m
⇒p²=25m² ————-(ii)
From equations (i) and (ii), we get,
5q²=25m²
⇒q²=5m²
⇒q² is a multiple of 5
⇒q is a multiple of 5
Hence, p,q have a common factor 5. This contradicts our assumption that they are co-primes. Therefore, p/q is not a rational number
√5 is an irrational number
Hence proved
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