y={x+[x+(x)^0.5]^0.5}^0.5求导

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}] （x+3y)²-2（x-y)（x+y)+(x+y)²其x=0.5,y=-2 y={x+[x+(x)^0.5]^0.5}^0.5求导 matlab画二元函数图像z = (x/(x+y) + 1.96*1.96/(2*(x+y)) - 1.96 * ((x/(x+y)*(1-x/(x+y))+1.96*1.96/(4*(x+y)))/(x+y))^0.5)/(1+1.96*1.96/(x+y))该怎么画 已知x+y=-4试计算多项式0.5(x+y)+4(x-y)-3(x-y)-1.5(x+y)-x+y的值 A={（x,y)|y>=0.5|x-2|},B={(x,y)|y y=x(x y=2x^2-4x-8 y=0.5x^2+2x-1 y=(x-1/x)/2反函数为y=x+(x^2+1)^0.5 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 x+0.5y=500 x=?y=? 3x+y=5,y=-0.5,x=? 1/2x=0.5y则y/x()/(). 1/2x=0.5y则y/x()/(). 化简 x / y(x+y) - y / x(x+y) = 15/(X+Y)=0.5 15/(X-Y)=3能得出x+y=30 x-y=5? (x-5y)(-x-5y)-(-x+5y)^2,其中x=0.5,y=-1.计算 先因式分解再求值:(x+y)的平方-(x+y)(3y-x),其中x=2.5,y=-0.5