At What Point Is the Following Function a Local Maximum $$f ( x , y ) = 3 - 10 x + 12 y - 5 x ^ { 2 } - 6 y ^ { 2 }$$

question 76

Multiple Choice

At what point is the following function a local maximum?
$$f ( x , y ) = 3 - 10 x + 12 y - 5 x ^ { 2 } - 6 y ^ { 2 }$$

• A) \(( 1,1 )\)
• B) \(( - 1,1 )\)
• C) \(( 3,1 )\)
• D) \(( 0,1 )\)
• E) \(( 1 , - 1 )\)

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