railway RRB Technician Grade 1 Mock Test 2024 Quantitative Aptitude Algebra Quadratic Equation

k का न्यूनतम धनात्मक मान क्या है, जिसके लिए समीकरण x2 + kx + 9 = 0 के मूल वास्तविक हैं?

1
k ≥ 6
2
k = 4
3
k = 6
4
k ≥ 4
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