Hi,

If any one can tell me how to solve the nonlinear system sys:={x^2+y^2+z^2=4,x^2+y^2-z^2=4,x+y+z=0} by using fsolve command? I tried fsolve(sys,{x,y,z});, but there is no value returned. May I give fsolve an initial approxiamtaion of the solution ? If that is the case, what should I do?

Thanks in advance!

Hi,

Is there any one can tell me how to plot a curve(e.g f(x,1)=2x^2-x-1) by the command spacecurve?

Thanks in advance!

Hi,

Is there any one can tell me why I get so many solutions there by use solve(f(x),{x,y},explicit)? There suppose to be only two solutions. Thanks in advance!