0 reads0 ratings0 helpful
Rina says, “\(\sqrt{18}\) is rational because 18 is an integer.” Which option correctly identifies her error?रीना कहती है, “\(\sqrt{18}\) परिमेय है क्योंकि 18 एक पूर्णांक है।” उसकी त्रुटि को कौन-सा विकल्प सही बताता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 18 is not a perfect square; \(\sqrt{18}=3\sqrt{2}\), which is irrational18 पूर्ण वर्ग नहीं है; \(\sqrt{18}=3\sqrt{2}\), जो अपरिमेय है
18 is not a perfect square. \(\sqrt{18}=\sqrt{9\times2}=3\sqrt2\), and \(\sqrt2\) is irrational, so \(3\sqrt2\) is also irrational. Exam tip: factor the number into perfect-square factors before classifying its square root.18 पूर्ण वर्ग नहीं है। \(\sqrt{18}=\sqrt{9\times2}=3\sqrt2\) और \(\sqrt2\) अपरिमेय है, इसलिए \(3\sqrt2\) भी अपरिमेय है। परीक्षा में वर्गमूल वाली संख्या को पूर्ण वर्ग गुणनखंडों में तोड़कर जाँचें।
Student feedback
Was this question useful?
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Difficulty
Easy0%
Medium0%
Hard0%
Was the explanation clear?
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
