计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2x+1)]+[(x²-3x-4)/(1-x²)]
问题描述:
计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2x+1)]+[(x²-3x-4)/(1-x²)]
答
计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2x+1)]+[(x²-3x-4)/(1-x²)]