已知m m分之1=2 计算m²分之m四次方 m二次方 1的值-搜答案-智慧作业帮

m/（m/5+m/3)*(a/3-1/2a)*4a=1/1/5+1/3)*(1/3-1/2)*4=15/8*(-1/6)*4=-5/4

x/2-m=x+m/3x/2=-4m/3x=-8m/3(x+1)/2=3x-2x+1=6x-4x=11×(-8m/3)=1m=-3/8

2×3分之1=2分之1-3分之1,3×4分之1=3分之1-4分之1；计算：3×4分之1+4×5分之1+5×6分之1+6×7分之1+7×8分之1+8×9分之1=1/3-1/4+1/4-1/5+1/5-1

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

m-1分之1-2m+m的平方-m的平方-m分之m-1=（m-1）²/(m-1)-(m-1)/m(m-1)=m-1-1/m=(m²-m-1)/m=(3-√3-1)/√3=(2-√3)

m+m分之1=3平方m^2+2+1/m^2=9m的平方+m的平方分之1=7

透明的鱼吹泡泡：2/(m-3)-(1-m)/(3-m)=2/(m-3)+(1-m)/(m-3)=(2+1-m)/(m-3)=(3-m)/(m-3)=-1

因m+m分之1=根号5m>0(m+1/m)=5(m+1/m)^2=25m^2+2+(1/m)^2=25m^2-2+(1/m)^2=21(m-1/m)^2=21m>（1/m）(m-1/m)=根号下21m

由1/m+1/n=1/(m+n),得(m+n)/(mn)=1/(m+n)(m+n)^2=mn那么n/m+m/n=(m^2+n^2)/(mn)=((m+n)^2-2mn)/(mn)=(mn-2mn)/(

1+2分之1-6分之5+12分之7-20分之9+30分之11-42分之13=1+1/2-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)=1+1/2-

（1/m-m)^2=(1/m)^2+m^2-2=1所以(1/m)^2+m^2=1+2=3

1、=a/(a-4)-4/(a-4)=(a-4)/(a-4)=12、=4/(m+2)(m-2)-(m+2)/(m+2)(m-2)=(4-m-2)/(m+2)(m-2)=-(m-2)/(m+2)(m-2

1/m+1/n=1/(m+n)即（m+n）/m+(m+n)/n=1即n/m+m/n+2=1所以n/m+m/n=-1

等于23啊前面式子等号两边同时平方

m^2+1/(m^2)=(m+1/m)^2-2=3^2-2=9-2=7

解m/n=1/5∴n=5m∴(m+n)/(m-n)=(m+5m)/(m-5m)=6m/(-4m)=-3/2

把1/2代人1/4(2x-M-2)=(x-M)/3解得M=(2+或-根号下94）/4多项式化简得-（2M^2+3)/2M代人得73/16+或-8分之根号94

=12/(m+3)(m-3)-2/(m-3)+1/(m+3)=12/(m+3)(m-3)-2(m+3)/(m+3)(m-3)+(m-3)/(m+3)(m-3)=(12-2m-6+m-3)/(m+3)(