InterviewSolution
Saved Bookmarks
| 1. |
The set of real values of `x` satisfying `log_(1/2) (x^2-6x+12)>=-2`A. `(-oo, 2]`B. `[2, 4]`C. `[4, oo)`D. none of these |
|
Answer» Correct Answer - B As `x^(2)-6x + 12 gt 0` for all x. Therefore, `"log"_(1//2)(x^(2)-6x + 12)` is defined for all` x in R` Now, `"log"_(1//2)(x^(2)-6x + 12) ge -2` `rArr x^(2)-6x + 12 le ((1)/(2))^(-2)` `rArr x^(2)-6x +8 le 0 rArr (x-2)(x-4) le 0 rArr x in [2, 4]` |
|