समीकरण (5x-2-2(k+1)x+(k-3)=0) के वास्तविक मूलों के लिए सही शर्त क्या है?
What is the correct condition for real roots of (5x-2-2(k+1)x+(k-3)=0)?
Explanation opens after your attempt
A. \(k^2-3k+16\ge0\)
Concept
Here (D=4[(k+1)2-5(k-3)]=4\(k^2-3k+16\)). This expression is always positive, so real roots always exist.
Why this answer is correct
The correct answer is A. \(k^2-3k+16\ge0\). Here (D=4[(k+1)2-5(k-3)]=4\(k^2-3k+16\)). This expression is always positive, so real roots always exist.
Exam Tip
यहाँ (D=4[(k+1)2-5(k-3)]=4\(k^2-3k+16\)) है। यह अभिव्यक्ति हमेशा धनात्मक है, इसलिए वास्तविक मूल हमेशा मिलेंगे।
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