Find an upper bound for the magnitude |E| of the error in the approximation f(x, y) ? L(x, y) at the given point over the given region R.
at 
; R: |x + 3| ? 0.1, |y - 7| ? 0.1
A. |E| ? 0.02
B. |E| ? 0.04
C. |E| ? 0
D. |E| ? 0.01
Answer: C
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