Evaluate $f _ { x }$ And $f _ { y }$

question 43

Multiple Choice

Evaluate $f _ { x }$ and $f _ { y }$ for the function $f ( x , y ) = \frac { 7 x y } { \sqrt { x ^ { 2 } + y ^ { 2 } } }$ at the point $( 4,8 )$ . Round your answer to two decimal places.

• A) \(f _ { x } ( 4,8 ) =\) 5.01 and \(f _ { y } ( 4,8 ) =\) 0.63
• B) \(f _ { x } ( 4,8 ) =\) 4.51 and \(f _ { y } ( 4,8 ) =\) 0.63
• C) \(f _ { x } ( 4,8 ) =\) 3.13 and \(f _ { y } ( 4,8 ) =\) 6.26
• D) \(f _ { x } ( 4,8 ) =\) 5.01 and \(f _ { y } ( 4,8 ) =\) 0.13
• E) \(f _ { x } ( 4,8 ) =\) 3.13 and \(f _ { y } ( 4,8 ) =\) 6.26

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