Use the Newton-Raphson method to find an approximate value of the extremum of the function f(x,y)=(x² +y² -1) –x³y' starting from the initial point (*o,Vo)=(1,1) and limiting to a single iteration....

Extracted text: Use the Newton-Raphson method to find an approximate value of the extremum of the function f(x,y)=(x² +y² -1) –x³y' starting from the initial point (*o,Vo)=(1,1) and limiting to a single iteration. One can use the remarkable identity of degree 3: (a+b+c)° = a° +b° +c° +3(a*b+a°c+b°c+ab² +ac² +bc² ) + 6abc