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If the equation `x^(2)-kx+1=0` has nor real roots thenA. `klt-2`B. `kgt2`C. `-2ltklt2`D. None of these |
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Answer» Correct Answer - C For no real roots, we must have:` b^(2)-4aclt0.` `k^(2)-4lt0impliesk^(2)lt4implies-2ltklt2.` |
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