समीकरण (x-2+2\(\lambda-1\)x+\lambda-2+1=0) के वास्तविक मूलों के लिए \(\lambda\) पर सही शर्त क्या है?
What is the correct condition on \(\lambda\) for real roots of (x-2+2\(\lambda-1\)x+\lambda-2+1=0)?
Explanation opens after your attempt
A. \(\lambda\le0\)
Concept
Here (D=4\(\lambda-1\)2-4\(\lambda^2+1\)=-8\lambda). For real roots \(D\ge0\), so \(\lambda\le0\).
Why this answer is correct
The correct answer is A. \(\lambda\le0\). Here (D=4\(\lambda-1\)2-4\(\lambda^2+1\)=-8\lambda). For real roots \(D\ge0\), so \(\lambda\le0\).
Exam Tip
यहाँ (D=4\(\lambda-1\)2-4\(\lambda^2+1\)=-8\lambda) है। वास्तविक मूलों के लिए \(D\ge0\), इसलिए \(\lambda\le0\)।
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