Show that √5 is an irrational number and hence 2√5 is also an irrational number. (Answer in Step-by-step)
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Step-by-step explanation:
Say, √5 is a rational number. ∴ It can be expressed in the form p/q where p,q are co-prime integers. Hence, p,q have a common factor 5. ... This proves that √5 is an irrational number.
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