2. 考研
  3. A、∫0πdθ∫02acosθf(rcosθ，rsinθ)rdr B、∫0πdθ∫02asinθf(rcosθ，rsinθ)rdr C、∫-π/2π/2dθ∫02acosθf(rcosθ，rsinθ)rdr D、∫-π/2π/2dθ∫02asinθf(rc

A、∫0πdθ∫02acosθf(rcosθ，rsinθ)rdr B、∫0πdθ∫02asinθf(rcosθ，rsinθ)rdr C、∫-π/2π/2dθ∫02acosθf(rcosθ，rsinθ)rdr D、∫-π/2π/2dθ∫02asinθf(rc

admin2022-11-10  70
问题
选项 A、∫0πdθ∫02acosθf(rcosθ，rsinθ)rdr
B、∫0πdθ∫02asinθf(rcosθ，rsinθ)rdr
C、∫-π/2π/2dθ∫02acosθf(rcosθ，rsinθ)rdr
D、∫-π/2π/2dθ∫02asinθf(rcosθ，rsinθ)rdr
答案B
解析
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考研数学三

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