Help with extremes of function in multivariable calculus
Needs Answer
Hello, im new here. I was hoping to find someone that could help me to obtain extremes of a function using this as example: " f(xy) = x^2 - 7x^2 - 3y^2 + 4x^3 "
I am very bad at math, but do not want to fail again:(
The same question 
sigue el proceso habitual: haz las derivadas parciales; igualalas a cero y resuelve el sistema
`para eso creo que debes usar mejor la ventana CAS
lee la ayuda de los comandos derivative() y solve()
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