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If (2x^2+kx+8=0) has no real roots, which condition is correct for (k)?यदि (2x^2+kx+8=0) के वास्तविक मूल नहीं हैं, तो (k) के लिए सही शर्त कौन सी है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (k^2<64)(k^2<64)
For no real roots, (D<0), so (k^2-64<0), that is (k^2<64). In exams, connect (D<0) with no real roots.वास्तविक मूल न होने के लिए (D<0), इसलिए (k^2-64<0) अर्थात (k^2<64)। परीक्षा में (D<0) को no real roots से जोड़ें।
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