यदि (f(x)=\sqrt{x-2-16}) है, तो (f(-5)) क्या है?
If (f(x)=\sqrt{x-2-16}), what is (f(-5))?
Explanation opens after your attempt
A. (3)
Concept
(f(-5)=\sqrt{25-16}=\sqrt{9}=3). In exams the principal value of square root is non-negative.
Why this answer is correct
The correct answer is A. (3). (f(-5)=\sqrt{25-16}=\sqrt{9}=3). In exams the principal value of square root is non-negative.
Exam Tip
(f(-5)=\sqrt{25-16}=\sqrt{9}=3) है। परीक्षा में वर्गमूल की principal value non-negative होती है।
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