1.

If the quadratic equation x^(2) + 2 (k + 1) x + 9k - 5 = 0has exactly one positive root, then k lies in the set

Answer»

`[5//9, INFTY)`
`(- infty, 1) cup (6, infty)`
`(- infty, 5//9]`
[1,6]

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