Find an upper bound for the magnitude |E| of the error in the linear approximation L to f at the given point over the given region.
at 
R: |x + 3| ? 0.1, |y + 4| ? 0.1
A. |E| ? 0.01
B. |E| ? 0.04
C. |E| ? 0.02
D. |E| ? 0
Answer: D
Mathematics
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A. 
? 
B. 
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