m减3减m 3分之7除以m减3
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m等于它的倒数m=1/mm^2=1m=正负1m平方加m减6,除以m减2m^2+m-6=(m+3)(m-2)(m+3)(m-2)/(m-2)=m+3除以m加3(m+3)/(m+3)=1除以m平方减3m加
(m²-3m)/(9-m²)=m(m-3)/(3+m)(3-m)=-m/(m+3);您好,很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不明白可以追问,如果满意
m+1/m=3平方m²+2+1/m²=9m²+1/m²=7(m-1/m)²=m²-2+1/m²=7-2=5
2m-4分之m-3除以(m-2分之5减m-2)=(m-3)/2(m-2)÷[5/(m-2)-(m+2)(m-2)/(m-2)]=(m-3)/2(m-2)×(m-2)/(3+m)(3-m)=-1/2(m
解题思路:利用分式的运算求解。解题过程:过程请见图片。最终答案:略
mn分之m-n等于n分之1减m分之1(m-n)/mn=1/n-1/m1*3分之4加3*5分之4加5*7分之四=4(1/1*3+1/3*5+1/5*7)=4(1/2(1-1/3)+1/2(1/3-1/5
若m等于它的倒数即m=1/mm²=1m=±1(m²+m-6)/(m-2)÷(m+3)/(m²-3m+1)=[(m+3)(m-2)/(m-2)]*[(m²-3m+
原式=m/(m+3)+6/(m+3)(m-3)*(m-3)/2=m/(m+3)+3/(m+3)=(m+3)/(m+3)=1
49是7的平方,除以m的平方减7m分之一,变成m的平方减7m,约去m的平方,得7的平方减去7m,再提出7,得7(7-m)
原式=2m3+3m-m3-5m+3m3-1=4m3-3m+3m-1=4m3-2m-1,当m=-1时,代入4m3-2m-1=-3.
(m-3除以3m的2次方-6m)除以(m+2-m-2分之5)=(m-3)/(3m^2-6m)÷[m+2-5/(m-2)]=(m-3)/3m(m-2)÷[(m+2)(m-2)-5]/(m-2)=(m-3
3-m/2m-4除以(m+2-5/m-2)=(3-m)/2(m-2)÷((m+2)(m-2)-5)/(m-2)=(3-m)/2(m-2)÷(m²-9)/(m-2)=(3-m)/2(m-2)×
原式=m^3-m-1=2根号3-1
12/(m^2-9)+2/(3-m)=[12-2(m+3)]/(m^2-9)=-2(m-3)/(m^2-9)=-2/(m+3).
[m/(m+3)-6/(m^2-9)]÷[2/(m-3)]=[m/(m+3)-6/(m+3)(m-3)]×[(m-3)/2]={[m(m-3)-6]/[(m+3)(m-3)]}×[(m-3)/2]=(