A) $- 5 y$ B) 0
C) $4 x$ D) $5 y$

question 69

Multiple Choice

$\text { Find the limit } \lim _ { \Delta x \rightarrow 0 } \frac { f ( x + \Delta x , y ) - f ( x , y ) } { \Delta x } \text { for the function } f ( x , y ) = 4 x ^ { 2 } - 5 y$

• A) \(- 5 y\)
• B) 0
• C) \(4 x\)
• D) \(5 y\)
• E) \(8 x\)

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