Question: plz solve part c Ichoose from Euler's Theorem (b) Find all local maxima, local minima, and saddle points of the given function. /(x.y) = x-

plz solve part c

Ichoose from Euler's Theorem (b) Find all local maxima, local minima, and saddle points of the given function. /(x.y) = x- y' -2x+4y+6 (c) Show that W= sin(x + cr) + cos(2x +2ct). Satisfies one-dimensional wave equation
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