使分式(3-4x)/(x²+1)的值是负数x的取值范围是()
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![使分式(3-4x)/(x²+1)的值是负数x的取值范围是()](/uploads/image/z/2096773-61-3.jpg?t=%E4%BD%BF%E5%88%86%E5%BC%8F%EF%BC%883-4x%EF%BC%89%2F%EF%BC%88x%26%23178%3B%2B1%EF%BC%89%E7%9A%84%E5%80%BC%E6%98%AF%E8%B4%9F%E6%95%B0x%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%EF%BC%88%EF%BC%89)
使分式(3-4x)/(x²+1)的值是负数x的取值范围是()
使分式(3-4x)/(x²+1)的值是负数x的取值范围是()
使分式(3-4x)/(x²+1)的值是负数x的取值范围是()
即(3-4x)/(x²+1)0
所以3-4x3
x>3/4
(3-4x)/(x²+1)
因为x²+1>0
所以
3-4x<0
4x>3
x>3/4
﹙3-4x﹚/﹙x²+1﹚<0
3-4x<0
x>3/4