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1. |
Let S denotes the set of all real values of the parameter a for which every solution of the inequality log1/2 x2 log1/2 (x + 2) is the solution of the inequality 49x2 4a4 0. What is the value of S? |
A. | (- , - 7) ( 7, ) |
B. | (- , - 7] [ 7, ) |
C. | (- 7, 7) |
D. | [- 7, 7] |
Answer» C. (- 7, 7) | |