用m的代数式来表示x1分之1 x2分之1-搜答案-拍题作业网

若x=3^m+1则3^m=x-1y=-1+9^m=-1+3^2^m=-1+3^m^2=-1+(x-1)^2=x^2-2x再问：你们的谁对？

因为x=2^m+1所以x-1=2^m因为4^m=（2^m）^2所以y=3+4^m=3+（2^m）^2=3+（x-1）^2=3+x^2-2x+1=x^2-2x+4

1、两边乘62x-2y-3x-3y=6x+5y+6=0所以5y=-x-6y=(-x-6)/52、x+5y+6=0所以x=-5y-6

（Y+1)/(Y-1)=XY+1=X(Y-1)XY-Y=2Y(X-1)=2Y=2/(X-1)再问：XY-Y=2你这一步错了，不过提醒我做法了Y+1=XY-X1+X=XY-Y1+X=Y(X-1)Y=(1

y=m-1m=y+1把m=y+1代入x=3m+1得：x=3(y+1)+1x=3y+4

x(1+m)=1-mx+xm=1-mm=(1-x)/(1+x)y=(2-3m)/(3-2m)=[2-3(1-x)/(1+x)]/[3-2(1-x)/(1+x)]=(5x-1)/(5x+1)当x=3时,

(2m+5)/(n-2)=32m+5=3n-63n=2m+11n=2m/3+11/3

x=(y-1)/(y+1)x(y+1)=y-1xy+x=y-1xy-y=-x-1y(x-1)=-(x+1)y=-(x+1)/(x-1)

n=6m+17

y=(x-2m)/3再问：为什么呢这是为什么?????????????????????????????????再答：不为什么x=2m+3yx-2m=3y(x-2m)/3=y

27的m次方=3³的m次方=（3的m次方）³x=3的m次方-13的m次方=x+1y=2+27的m次方=2+（x+1）³

2^x+2=m2^x×2^2=m2^x=m/4

x/3-y/5=75x-3y=1053y=5x-105y=5x/3-35

X1+X2=3/2X1*X2=-5/2(1)1/X1+1/X2=(X1+X2)/X1*X2=-3/5(2)x1²+x2²=(X1+X2)²-2*X1*X2=29/4(3)

y=(x+1)/xxy=x+1xy-x=1x(y-1)=1x=1/(y-1)

x=1+3^m3^m=x-13^(-m)=1/(x-1)y=1-3^-m=1-1/(x-1)=(x-1-1)/(x-1)=(x-2)/(x-1)

1.2^x=m-12.2^(x+y)=2^x*2^y=ab,2^(2x+3y)=(2^x)^2*(2^y)^3=a^2b^33.围成正方形的面积为(4*10^2cm/4)^2=10^4平方厘米圆面积=

(x+y)/2-(x-y)/3=1等式两边同时乘以6,得3(x+y)-2(x-y)=63x+3y-2x+2y=6x+5y=65y=6-xy=(6-x)/5