(a) dA = __(15)__ , where D is the region in the first quedrant that lies betwoen the circles x2 + y2 = 4and (x-1)2+y2=1.
阿摩線上測驗
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dA = __(15)__ , where D is the region in the first quedrant that lies betwoen the circles x2 + y2 = 4and (x-1)2+y2=1.