फलन \(y=\sqrt{25-x^2}\) किस वृत्त का ऊपरी अर्धभाग है?
The graph \(y=\sqrt{25-x^2}\) is the upper semicircle of which circle?
Explanation opens after your attempt
A. \(x^2+y^2=25\)
Concept
Squaring gives \(y^2=25-x^2\), so \(x^2+y^2=25\). Because of the square root only the upper part appears.
Why this answer is correct
The correct answer is A. \(x^2+y^2=25\). Squaring gives \(y^2=25-x^2\), so \(x^2+y^2=25\). Because of the square root only the upper part appears.
Exam Tip
वर्ग करने पर \(y^2=25-x^2\) से \(x^2+y^2=25\) मिलता है। वर्गमूल के कारण केवल ऊपरी भाग आता है।
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