已知a.b互为相反数,c.d互为倒数,m的绝对值等于二.求a²-b²+(cd)(负一次方)÷(1-2m+m²
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![已知a.b互为相反数,c.d互为倒数,m的绝对值等于二.求a²-b²+(cd)(负一次方)÷(1-2m+m²](/uploads/image/z/1171015-7-5.jpg?t=%E5%B7%B2%E7%9F%A5a.b%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2Cc.d%E4%BA%92%E4%B8%BA%E5%80%92%E6%95%B0%2Cm%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%E7%AD%89%E4%BA%8E%E4%BA%8C.%E6%B1%82a%26sup2%3B-b%26sup2%3B%2B%EF%BC%88cd%EF%BC%89%EF%BC%88%E8%B4%9F%E4%B8%80%E6%AC%A1%E6%96%B9%EF%BC%89%C3%B7%EF%BC%881-2m%2Bm%26sup2%3B)
已知a.b互为相反数,c.d互为倒数,m的绝对值等于二.求a²-b²+(cd)(负一次方)÷(1-2m+m²
已知a.b互为相反数,c.d互为倒数,m的绝对值等于二.求a²-b²+(cd)(负一次方)÷(1-2m+m²
已知a.b互为相反数,c.d互为倒数,m的绝对值等于二.求a²-b²+(cd)(负一次方)÷(1-2m+m²
a.b互为相反数,则a²=b²
c.d互为倒数,则cd=1
m的绝对值等于二.m=2或-2
a²-b²+(cd)(负一次方)÷(1-2m+m²)=0+1÷1=1
或a²-b²+(cd)(负一次方)÷(1-2m+m²)=0+1÷9=1/9
原式等于1/〔(m-1)²〕,解得等于1或1/9.