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1. |
Consider the following languages:L1 = {anbmcn + m: m, n ≥ 1}L2 = {anbnc2n: n ≥ 1}Which one of the following is TRUE? |
A. | Both L1 and L2 are context-free |
B. | L1 is context-free while L2 is not context-free |
C. | L2 is context-free while L1 is not context-free |
D. | Neither L1 nor L2 is context-free |
Answer» C. L2 is context-free while L1 is not context-free | |