मान लीजिए कि \(r=\sqrt{2}+\sqrt{3}\) एक परिमेय संख्या है। इस मान्यता से प्राप्त कौन-सा निष्कर्ष विरोधाभास सिद्ध करता है कि \(\sqrt{2}+\sqrt{3}\) अपरिमेय है?
Suppose \(r=\sqrt{2}+\sqrt{3}\) is a rational number. Which conclusion from this assumption proves by contradiction that \(\sqrt{2}+\sqrt{3}\) is irrational?
Correct answer and explanation
A. \(r^2=5+2\sqrt{6}\), अतः \(\sqrt{6}\) परिमेय होगा, जो असंभव है\(r^2=5+2\sqrt{6}\), so \(\sqrt{6}\) would be rational, which is impossible
Simple Explanation
परिमेय \(r\) के लिए \(r^2\) भी परिमेय है। \(r^2=5+2\sqrt6\) से \(\sqrt6=(r^2-5)/2\) परिमेय होगा, जबकि 6 पूर्ण वर्ग नहीं है। टिप: वर्ग करते समय \(2\sqrt6\) न छोड़ें। / If \(r\) were rational, \(r^2\) would also be rational. From \(r^2=5+2\sqrt6\), \(\sqrt6=(r^2-5)/2\) would be rational, impossible because 6 is not a perfect square. Exam tip: retain the cross term \(2\sqrt6\).
Login to save your score, XP, coins and progress.
QR scan karne par isi question ka correct answer aur explanation khula hua milega.
Open answer link