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f(x,y,z)=Axy^2+Byz+Cx^3*z^2

given data: at point(1,2,-1) the maximum pointed devertive of f is

at direcation

x=0 y=0 z=1

and its value is 32

so what are they A,B ,C?

the only thing i know that since the func is differncial

32=(0,0,1)*grad f

and from here we get

B-C=16

but how do we get 2 more equation?

i dunno how to use the data that this is the max pointed devertive

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# Maximum pointed devertive

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