फलन (f(x)=4-\sqrt{x-5}) की रेंज क्या है?
What is the range of (f(x)=4-\sqrt{x-5})?
Explanation opens after your attempt
Correct Answer
A. (\(-\infty,4]\)
Concept
\(\sqrt{x-5}\ge0\), so \(4-\sqrt{x-5}\le4\). In exams if a minus sign is before the square root, outputs go downward.
Why this answer is correct
The correct answer is A. (\(-\infty,4]\). \(\sqrt{x-5}\ge0\), so \(4-\sqrt{x-5}\le4\). In exams if a minus sign is before the square root, outputs go downward.
Exam Tip
\(\sqrt{x-5}\ge0\), इसलिए \(4-\sqrt{x-5}\le4\)। परीक्षा में वर्गमूल से पहले ऋण चिह्न हो तो output नीचे की ओर जाता है।
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