设y(x)=(1+x^3)(5-1/x^2),求y'(1),y'(a).
集合题 设A={(X,Y)|3X+2Y=1} B={(X,Y)|X-Y=2} C={(X,Y)|3X-3Y=5} 求A∩
设y=[a^(2x+1)]+3x,求y的导数
设U={(x,y)|y=3x-1},A={(x,y)|(y-2)/(x-1)=3},求A的补集?
设A={(x,y)|y=-2x+3,x,y∈R},B={(x,y)|y=(4-3m^2)x+1,x,y∈R},求A∩B≠
设U={(X,Y)}|X,Y属于R},A={(X,Y)Y-3/X-2=1},B=(X,Y)|Y=X+1},求CuA与B的
设全集U={(x,y)x∈R,y∈R},集合A={(x,y)|x-2分之y-3=1},B={(x,y)|y≠x+1},求
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
设y=1/(x*x-3*x-2),求y的n阶导数
设变量xy满足 x+y-3 x-y+1 3x-y+5 z=x+y/x
设A={(x,y)|3x+2y=1},B={(x,y)|x-y=2},C={(x,y)|2x-2y=3},D={(x,y
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y