यदि (f(x)=\frac{1}{\sqrt{5-x}}), तो वास्तविक प्रान्त कौन-सा है?
If (f(x)=\frac{1}{\sqrt{5-x}}), what is the real domain?
Explanation opens after your attempt
A. (\(-\infty,5\))
Concept
For the square root, \(5-x\ge0\) is needed.
Why this answer is correct
But this square root is in the denominator, so it cannot be zero.
Exam Tip
Thus (5-x>0), meaning (x<5), so the domain is (\(-\infty,5\)). चरण 1: वर्गमूल के लिए \(5-x\ge0\) चाहिए। चरण 2: लेकिन यह वर्गमूल हर में है, इसलिए शून्य नहीं हो सकता। चरण 3: अतः (5-x>0), यानी (x<5), इसलिए प्रान्त (\(-\infty,5\)) है।
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