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 - 2| ? 0.2, |y - 1| ? 0.2
A. |E| ? 12.16512
B. |E| ? 17.23392
C. |E| ? 17.47104
D. |E| ? 22.30272
Answer: D
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