यदि (f(x)=\sqrt{x-2-9}) है, तो (f(5)) क्या है?
If (f(x)=\sqrt{x-2-9}), what is (f(5))?
Explanation opens after your attempt
A. (4)
Concept
(f(5)=\sqrt{25-9}=\sqrt{16}=4). In exams take the principal positive square root.
Why this answer is correct
The correct answer is A. (4). (f(5)=\sqrt{25-9}=\sqrt{16}=4). In exams take the principal positive square root.
Exam Tip
(f(5)=\sqrt{25-9}=\sqrt{16}=4) है। परीक्षा में वर्गमूल की मुख्य धनात्मक वैल्यू लें।
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