Think Break #5
Think Break #5. Give the 1 st and 2 nd derivatives f x ( x,y ), f y ( x,y ),, f xx ( x,y ), f yy ( x,y ), f xy ( x,y ) of each function: f( x,y ) = 7 + 5x + 2y – 5x 2 – 4y 2 – 11xy f( x,y ) = – 5 – 2x + y – x 2 – 3y 2 + 2xy. Think Break #5:Answer.
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