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1. |
The equation \[\left| |x-1|+a \right|=4\] can have real solution for x if 'a' belongs to the interval |
A. | \[(-\infty ,+\infty )\] |
B. | \[(-\infty ,4]\] |
C. | \[(4,+\infty )\] |
D. | \[[-4,4]\] |
Answer» C. \[(4,+\infty )\] | |