1/﹙2x+3﹚+21/﹙2x³+3x²-2x-3﹚-3/﹙x²-1﹚-1/﹙2x²+5x+3﹚=0
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 23:49:46
![1/﹙2x+3﹚+21/﹙2x³+3x²-2x-3﹚-3/﹙x²-1﹚-1/﹙2x²+5x+3﹚=0](/uploads/image/z/1790459-35-9.jpg?t=1%2F%EF%B9%992x%2B3%EF%B9%9A%2B21%2F%EF%B9%992x%26%23179%3B%2B3x%26%23178%3B-2x-3%EF%B9%9A%EF%BC%8D3%EF%BC%8F%EF%B9%99x%26%23178%3B%EF%BC%8D1%EF%B9%9A%EF%BC%8D1%EF%BC%8F%EF%B9%992x%26%23178%3B%EF%BC%8B5x%EF%BC%8B3%EF%B9%9A%EF%BC%9D0)
x)3sQ<5eCsKkmc0ZרB$~O=@%P !D"n6 ]s
le~
]\[(GM]eSb +HF"g+g`@r4*]c@G \p }f@Ŷi9P*4I]M募^akcZ~qAb(z
1/﹙2x+3﹚+21/﹙2x³+3x²-2x-3﹚-3/﹙x²-1﹚-1/﹙2x²+5x+3﹚=0
1/﹙2x+3﹚+21/﹙2x³+3x²-2x-3﹚-3/﹙x²-1﹚-1/﹙2x²+5x+3﹚=0
1/﹙2x+3﹚+21/﹙2x³+3x²-2x-3﹚-3/﹙x²-1﹚-1/﹙2x²+5x+3﹚=0
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
((x²-1)+21-3(2x+3)-(x-1))/(x+1)(x-1)(2x+3)=0
即x²-1+21-6x-9-x+1=0
x²-7x+12=0
(x-3)(x-4)=0
解得x=3或x=4