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(1) kx+14=3(x-1) kx+14=3x-3 (k-3)x=-17 而x是整數,那麼k-3也是正數 於是k-3=±1,或±17 所以k=2,或k=4,或k=20,或k=-14 (2) (k-3)x=-17無解 那麼k-3=0,所以k=3
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