Find the critical points of the given function and then determine whether they are local maxima, local minima, or saddle points. f(x, y) = cos(x2 + y2) consider only the three critical points (0, 0), π 2 , π 2 , and (0, π )

Step-by-step explanation:

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the radius is 2 times the diameter.

step-by-step explanation:

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be