समीकरण \(x^2+8x+k=0\) के कोई वास्तविक मूल नहीं हैं। (k) पर सही शर्त क्या है?
The equation \(x^2+8x+k=0\) has no real roots. What is the correct condition on (k)?
Explanation opens after your attempt
Correct Answer
A. (k>16)
Concept
For no real roots, (D<0) is needed. Here (64-4k<0), so (k>16).
Why this answer is correct
The correct answer is A. (k>16). For no real roots, (D<0) is needed. Here (64-4k<0), so (k>16).
Exam Tip
कोई वास्तविक मूल न होने के लिए (D<0) चाहिए। यहाँ (64-4k<0), इसलिए (k>16)।
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