[f'(y)=[[-1,0],[0,0]]" positive real num...

[f'(y)=[[-1,0],[0,0]]" positive real number."],[" Where "R" is then prove that "|[xa,yb,zc],[yc,za,xb],[zb,xc,ya]|=xyz|[a,b,c],[b,c,a]],[[" If "x+y+z=0," then prove that "yc,xc]],[[" If "x+y+z=0," then prove that "yc,xc,ya]],[[" If "x+y+z=0," then prove that "yc,xc,ya,]]

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