कौन सा विकल्प \(\sqrt{a^2}=a\) हमेशा सही नहीं होने का कारण बताता है?
Which option explains why \(\sqrt{a^2}=a\) is not always true?
Explanation opens after your attempt
Correct Answer
A. यदि (a<0), तो \(\sqrt{a^2}=|a|\) होता हैIf (a<0), then \(\sqrt{a^2}=|a|\)
Concept
The principal square root is non-negative so \(\sqrt{a^2}=|a|\). In exams be careful when (a) is negative.
Why this answer is correct
The correct answer is A. यदि (a<0), तो \(\sqrt{a^2}=|a|\) होता है / If (a<0), then \(\sqrt{a^2}=|a|\). The principal square root is non-negative so \(\sqrt{a^2}=|a|\). In exams be careful when (a) is negative.
Exam Tip
मुख्य वर्गमूल अऋणात्मक होता है इसलिए \(\sqrt{a^2}=|a|\) है। परीक्षा में ऋणात्मक (a) के लिए सावधान रहें।
Login to save your score, XP, coins and progress.