1/﹙2x+3﹚+21/﹙2x³+3x²-2x-3﹚-3/﹙x²-1﹚-1/﹙2x²+5x+3﹚=0
问题描述:
1/﹙2x+3﹚+21/﹙2x³+3x²-2x-3﹚-3/﹙x²-1﹚-1/﹙2x²+5x+3﹚=0
答
2x³+3x²-2x-3=x²(2x+3)-(2x+3)=(x²-1)(2x+3)=(x+1)(x-1)(2x+3)2x²+5x+3=(2x+3)(x+1)1/﹙2x+3﹚+21/﹙2x³+3x²-2x-3﹚-3/﹙x²-1﹚-1/﹙2x²+5x+3﹚=0((x²...