9. (12%) EvaluatedA , where R is the trapezoid in the xy plane bounded by the lines x=0, y=x, x+y=1 and x+y=2.
阿摩線上測驗
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阿摩線上測驗
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dA , where R is the trapezoid in the xy plane bounded by the lines x=0, y=x, x+y=1 and x+y=2.