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Unformatted text preview: point. If it is impossible to tell if there is a saddle point or extremum at the point using the test in 9.3, then write I cannot tell. ( a, b ) f xx ( a, b ) f yy ( a, b ) f xy ( a, b ) (1,1) 1 22 (1,2)35 1 (1,3) 2 8 4 (1 , 1) : (1 , 2) : (1 , 3) :...
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 Fall '08
 WILDE
 Calculus, Derivative

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