defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Quantitative Aptitude Algebra Quadratic Equation

K के मान क्या हैं जिसके लिए समीकरण 4x2 - kx + 9 = 0 में वास्तविक मूल हैं?

1
k ≤ -12 and k ≥ 12
2
-12 < k < 12
3
12 < k < -12
4
-12 ≤ k ≤ 12
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