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If x ≥ 0, what is the principal square root of 9x²?यदि x ≥ 0 हो, तो 9x² का मुख्य वर्गमूल क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 3x3x
Since 9x² = (3x)² and x ≥ 0, 3x is non-negative. Thus the principal square root is 3x. Without the condition x ≥ 0, it would be 3|x|.क्योंकि 9x² = (3x)² और x ≥ 0 है, इसलिए 3x गैर-ऋणात्मक है। अतः मुख्य वर्गमूल 3x है। x ≥ 0 की शर्त न हो, तो उत्तर 3|x| होगा।
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