समीकरण \(x^2+4x+k=0\) के वास्तविक मूल होने के लिए (k) के बारे में कौन सी शर्त सही है?
For \(x^2+4x+k=0\) to have real roots, which condition on (k) is correct?
Explanation opens after your attempt
A. \(k\le4\)
Concept
For real roots \(D\ge0\) is required. From \(16-4k\ge0\), we get \(k\le4\).
Why this answer is correct
The correct answer is A. \(k\le4\). For real roots \(D\ge0\) is required. From \(16-4k\ge0\), we get \(k\le4\).
Exam Tip
वास्तविक मूलों के लिए \(D\ge0\) चाहिए। \(16-4k\ge0\) से \(k\le4\) मिलता है।
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