先化简,随便选个数带入(m²-1)÷(m+1)-(m²-m³)÷(m²-m),其中m≠±1,谢
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![先化简,随便选个数带入(m²-1)÷(m+1)-(m²-m³)÷(m²-m),其中m≠±1,谢](/uploads/image/z/3998290-58-0.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E9%9A%8F%E4%BE%BF%E9%80%89%E4%B8%AA%E6%95%B0%E5%B8%A6%E5%85%A5%28m%26%23178%3B-1%29%C3%B7%28m%2B1%29-%28m%26%23178%3B-m%26%23179%3B%29%C3%B7%28m%26%23178%3B-m%29%2C%E5%85%B6%E4%B8%ADm%E2%89%A0%C2%B11%2C%E8%B0%A2)
先化简,随便选个数带入(m²-1)÷(m+1)-(m²-m³)÷(m²-m),其中m≠±1,谢
先化简,随便选个数带入(m²-1)÷(m+1)-(m²-m³)÷(m²-m),其中m≠±1,谢
先化简,随便选个数带入(m²-1)÷(m+1)-(m²-m³)÷(m²-m),其中m≠±1,谢
(m²-1)÷(m+1)-(m²-m³)÷(m²-m)
=(m-1)-[-m(m²-m)÷(m²-m)]
=m-1+m
=2m-1
当m=2, 原式=2×2-1=3
(m²-1)÷(m+1)-(m²-m³)÷(m²-m),
=(m+1)(m-1)÷(m+1)-m²(1-m)÷m(m-1)
=m-1+m
=2m-1
当m=2时原式=4-1=3