समीकरण \(x^2-2ux+u^2+7u=0\) के वास्तविक मूलों के लिए (u) पर क्या शर्त है?
What condition on (u) is needed for real roots of \(x^2-2ux+u^2+7u=0\)?
Explanation opens after your attempt
A. \(u\le0\)
Concept
For real roots, \(D\ge0\) is needed. Here (D=4u-2-4\(u^2+7u\)=-28u), so \(u\le0\).
Why this answer is correct
The correct answer is A. \(u\le0\). For real roots, \(D\ge0\) is needed. Here (D=4u-2-4\(u^2+7u\)=-28u), so \(u\le0\).
Exam Tip
वास्तविक मूलों के लिए \(D\ge0\) चाहिए। यहाँ (D=4u-2-4\(u^2+7u\)=-28u), इसलिए \(u\le0\)।
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