√3x×√1/3x×y等于多少-搜答案-智慧作业帮

|x|=3x=3或-3|y|=5y=5或-5|x-y|=|x|+|y||x|=3|y|=5|x|+|y|=8|x-y|=8x-y=8或-8由此可得y=5x=-3或y=-5x=3x+y=2或-2x-y=

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y-x

即√3/3x+3=2/3x²-√3x+1两边乘3/2x²-2√3x=3x²-2√3x+3=3+3(x-√3)²=6x-√3=±√6x=√3+√6,x=√3-√6

（1/3X²-y)²+(1/3x²+y)²=1/9x^4+y^2-2/3*(x^2)*y+1/9x^4+y^2+2/3*(x^2)*y=2/9x^4+2*(y^

x=solve('y=4*x*x*x+3*x*x+x+2*x+1','x')x=1/4*(-3+8*y+2*(9-12*y+16*y^2)^(1/2))^(1/3)-3/4/(-3+8*y+2*(9-

X比y3：2=300：200所以y=200因为5z=300z=60则X=180Y=120所以X-Y=180-120=60

（2X-3Y-1）乘以（2X+3Y+1)=(2x)²-(3y+1)²=4x²-9y²-6y-1

3x²-xy+y²=101-xy+4y²=421-2得3x²-3y²=6x²-y²=2选B

（1/3X²-y)²+(1/3x²+y)²=2/9x^4+2y^4

2-x和x-2都在根号里,而根号里的数一定是大于等于0的,所以只能2-x和x-2都等于0,那么y=1/3

1/x-1/y=3则x-y=-3xyx-3xy-y/2x-xy-2y=(-3xy-3xy)/(-6xy-xy)=6/7

1/x-1/y=2(y-x)/xy=2y-x=2xy(3x+5xy-3y)/(x-xy-y)=[5xy-3(y-x)]/[-xy-(y-x)]=(5xy-6xy)/(-xy-2xy)=-xy/-3xy

2x-4=01+y=0y=-1x=2x方+y方=4+1=5

=3x²+6xy-xy-2y²=3x²+5xy-2y²

∵2(x+y)²-3x-3y-2=02(x+y)²-3(x+y)-2=0[(2(x+y)+1][(x+y)-2]=02(x+y)=-1或（x+y)=2即：x+y=-1/2或x+y=

3x-y+4x=(3+4)x-y=7x-y

X+Y=0.2(1)式X+3Y=1(2)式用(2)-(1)得2Y=0.8Y=0.4把Y=0.4代入得X=-0.23（X+2y)^2=1.08

x=8/3y=15/4就是这个了...

∫(x^3+2x√x-1/√x)dx=∫x³dx+2∫x^(3/2)dx-∫x^(-1/2)dx=1/4x^4+4/5x^(5/2)-2√x+C