分式的乘除计算:(1)m/m²-1·m²+m/m²;(2)x-2/3-x·x²-6x+9/x²-4;(3)3x-6/x²-4÷x+2/x²+4x+4;(4)x²-2x+1/x²-1÷x-1/x²+x.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 04:42:32
![分式的乘除计算:(1)m/m²-1·m²+m/m²;(2)x-2/3-x·x²-6x+9/x²-4;(3)3x-6/x²-4÷x+2/x²+4x+4;(4)x²-2x+1/x²-1÷x-1/x²+x.](/uploads/image/z/2766847-31-7.jpg?t=%E5%88%86%E5%BC%8F%E7%9A%84%E4%B9%98%E9%99%A4%E8%AE%A1%E7%AE%97%3A%281%29m%2Fm%26%23178%3B-1%C2%B7m%26%23178%3B%2Bm%2Fm%26%23178%3B%EF%BC%9B%282%29x-2%2F3-x%C2%B7x%26%23178%3B-6x%2B9%2Fx%26%23178%3B-4%EF%BC%9B%283%293x-6%2Fx%26%23178%3B-4%C3%B7x%2B2%2Fx%26%23178%3B%2B4x%2B4%EF%BC%9B%284%29x%26%23178%3B-2x%2B1%2Fx%26%23178%3B-1%C3%B7x-1%2Fx%26%23178%3B%2Bx.)
分式的乘除计算:(1)m/m²-1·m²+m/m²;(2)x-2/3-x·x²-6x+9/x²-4;(3)3x-6/x²-4÷x+2/x²+4x+4;(4)x²-2x+1/x²-1÷x-1/x²+x.
分式的乘除计算:
(1)m/m²-1·m²+m/m²;
(2)x-2/3-x·x²-6x+9/x²-4;
(3)3x-6/x²-4÷x+2/x²+4x+4;
(4)x²-2x+1/x²-1÷x-1/x²+x.
分式的乘除计算:(1)m/m²-1·m²+m/m²;(2)x-2/3-x·x²-6x+9/x²-4;(3)3x-6/x²-4÷x+2/x²+4x+4;(4)x²-2x+1/x²-1÷x-1/x²+x.
(1)[m/(m²-1)](m²+m)/m²=m²/(m²-1)](m+1)/m²=1/(m-1)
(2)[(x-2)/(3-x)][(x²-6x+9)/(x²-4)]
=[(x-2)/(3-x)][(x-3)²)/(x+2)(x-2)]
=-[(x-2)(x-3)(x+3)]/[(x-3)(x+2)(x-2)]
=-(x+3)/(x-2)
(3)(3x-6)/(x²-4)÷(x+2)/(x²+4x+4)
=[3(x-2)/(x²-4)][(x+2)²/(x+2)]
={3(x-2)(x+2)²}/[(x-2)(x+2)²]
=3
(4)(x²-2x+1)/(x²-1)÷(x-1)/(x²+x.)
=[(x-1)²x(x+1)]/[(x+1)(x-1)²]
=x