If AB + C = Ba + C = Ca + B = k, then the line y = KX + 2K must pass () A. Quadrant 1 and 2 b. quadrant 2 and 3 C. quadrant 3 and 4 d. quadrant 1 and 4

When a + B + C ≠ 0, according to the proportional property of the proportion, we get: k = a + B + C2 (a + B + C) = 12, then the straight line is y = 12x + 1, and the straight line must pass through quadrants 1, 2 and 3. When a + B + C = 0, that is, a + B = - C, then k = - 1, then the straight line is y = - X-2, that is, the straight line must pass through quadrants 2, 3 and 4

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