x^2+y^2+2x 8x+17=0,x^2009+xy已知x^2+y^2+2x 8x+17=0,求x^2009+xyx^2+y^2+2x-8x+17=0,x^2009+xy

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 求y=(x^2)+2x(x≥0) y=-x+2x(x 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值 已知X*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=? Y=X^2X (X>0) 求导Y=X^2X (X>0) 求d(Y)/d(X) 已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2) 已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2) 因式分解x(x+y)(x-y)-x(x+y)^2 x'2+2x+y'2-8y+17=0,求x'y的值 x^2+2x+y^2-8y+17=0,求x^y x+2x+y-8y+17=0,求x∧y y=x^2-2x（x y=x^2+2x(x 3^x+2x=y,x y=x^2-2x (x≥0) -x^2-2x(x 变量x,y满足x-2y=0,x mathematica软件,已知y[x],Y=f1(x),X(x)=f2(x),如何plot Y[X]?y[x_] := x + 9.81/2*x*xk=1X[x] = x - k*y'[x]/(1 + (y'[x])^2)^0.5Y[x] = y[x] + k/(1 + (y'[x])^2)^0.5Plot[{y[x],Y[X],},{x,0,2}]