Find all the first order partial derivatives for the following function.f(x, y) = ln 
A. 
= -ln
; 
= ln 
B. 
= 
; 
= 
C. 
= - 
; 
= 
D. 
= -ln 
; 
= ln 
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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A. 1.471 B. 14.706 C. 0.68 D. 6.8
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A. (0, 4), 
, 
, 
B. (0, 4), 
, 
, 
C. 
, 
, 
, 
D. (0, -4), 
, 
, 
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