作业帮y=(x^3-5x^2-x-3)/x^2求导过程
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y=(x^3-5x^2-x-3)/x^2求导过程
y=(x^3-5x^2-x-3)/x^2求导过程
y=(x^3-5x^2-x-3)/x^2求导过程
y=(x^3-5x^2-x-3)/x^2
=x-5-1/x-3/x²
∴y'=1-0+1/x²+6/x³
=1+1/x²+6/x³
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
3^x+2x=y,x
若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
x(x-y)2-(y-x)3
先化简,再求值 [2/3x - 2/x+y（x+y/3x -x-y）]*x/x-y,其中5x+3y=0
先化简,再求值:[3x-2/x+y(x+y/3x-x-y)]/(x-y/x),其中5x+3y=0
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解