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1. |
If the lines x + (a - 1)y + 1 = 0 and 2x + a2y - 1 = 0 are prepedicular, then the condition satisfied by a is |
A. | |a| = 2 |
B. | 0 < a < 1 |
C. | -1 < a < 0 |
D. | a = -1 |
Answer» E. | |