題組內容
2. Evaluate the following double or triple integrals. (30%)
(b)
dA, where R is the region bounded by x2+y2≥ 1, x2+y2≤4, and 0≤ y≤x.
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(b)dA, where R is the region bounded by x2+y2≥ 1, x2+y2≤4, and 0≤ y≤x.