y=(x/1 x)∧x

求导y=[x/(1+x)]^x求导y=[x/(1+x)]^x求导y=[x/(1+x)]^xy=[x/(1+x)]^xlny=x*ln(x/(1+x))lny=lnx-ln(1+x)两边求导,得：y''/

x>=1,x-yx>=1,x-yx>=1,x-yx>=1,x-y18,用坐标轴画个图就出来了。

y=x-1(xy=x-1(xy=x-1(x是啊,很简单的一个分段函数.当X是，是一个分段函数

y=x(xy=x(xy=x(x在0点的左极限是0右极限是1左右极限不相等函数不连续因此不可导y(0-)=0y(0)=y(0+)=1因为在x=0处不连续，所以不可导。

z=0.015x*x+y*x*0.05+(1-x-y)*2.5*(x+y)x>0.35.xy>0.70x+yz=0.015x*x+y*x*0.05+(1-x-y)*2.5*(x+y)x>0.35.xy

y''-(1/x)y=xe^-xy''-(1/x)y=xe^-xy''-(1/x)y=xe^-x典型的y‘-P(x)y=Q(x)的形式,两边同时乘以e^∫P(x)dx就可以了所以这里是乘以e^(∫-1/xd

求导：y=(lnx)^x+x^(1/x)求导：y=(lnx)^x+x^(1/x)求导：y=(lnx)^x+x^(1/x)分成两部分,第一部分为(lnx)^x求导设y1=(lnx)^x=e^(xln(l

函数,y=3x/(x^2+x+1),x函数,y=3x/(x^2+x+1),x函数,y=3x/(x^2+x+1),xy=3/(x+1/x+1)x+1/x≤-2,所以x+1/x+1≤-1令t=x+1/x+

函数y=3x/(x^2+x+1)（x函数y=3x/(x^2+x+1)（x函数y=3x/(x^2+x+1)（x原式可以化为：y*x^2+(y-3)*x+1=0Δ=(y-3)^2-4y≥0解得y≥9或y≤

y=3x/x²+x+1(xy=3x/x²+x+1(xy=3x/x²+x+1(xy=3x/(x²+x+1)(x当x=0时y=0当x不等0时y=3x/(x^2+x+

函数y=2x/x²-x+1（x函数y=2x/x²-x+1（x函数y=2x/x²-x+1（x望采纳哟（电脑照的不是很清楚.）

x-y/x-x+y/y-(x+y)(x-y)/y²y/x=2x-y/x-x+y/y-(x+y)(x-y)/y²y/x=2x-y/x-x+y/y-(x+y)(x-y)/y²

化简x/y(x+y)-y/x(x+y)=化简x/y(x+y)-y/x(x+y)=化简x/y(x+y)-y/x(x+y)=x^2-y^2为分子,xy(x+y)为分母

已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1

x.y都是自然数,且x(x-u)-y(y-x)+12,求x.y得值快1且x(x-y)-y(y-x)=12x.y都是自然数,且x(x-u)-y(y-x)+12,求x.y得值快1且x(x-y)-y(y-x

若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值若2/x-1/y=3,求[y

x+y=86/x+x/y=1x+y=86/x+x/y=1x+y=86/x+x/y=1如果题目没错的话,答案很复杂,看下这个有没用

y=x²-xy=x-1y=x²-xy=x-1y=x²-xy=x-1既-1=x²-2xx²-2x+1=0(x-1)²=0解得x=1

x(x+y)(x-y)-y(y+x)(y-x)=(x-y)()填空x(x+y)(x-y)-y(y+x)(y-x)=(x-y)()填空x(x+y)(x-y)-y(y+x)(y-x)=(x-y)()填空x

y=(2x)/x-1化简成用y表示xy=(2x)/x-1化简成用y表示xy=(2x)/x-1化简成用y表示xy=2x/(x-1)y(x-1)=2xxy-y=2xxy-2x=yx(y-2)=yx=y/(