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If the equation `x^(2)+5kx+16=0` has no real roots thenA. `kgt(8)/(5)`B. `klt(-8)/(5)`C. `(-8)/(5)ltklt2`D. None of these |
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Answer» Correct Answer - C For no real roots, we must have `b^(2)-4aclt0.` `:." "(25k^(2)-4xx16)lt0implies25k^(2)lt64impliesk^(2)lt(64)/(25)implies(-8)/(5)ltklt(8)/(5).` |
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