2. 考研
  3. 设M=∫-π/2π/2sinx/(1+x2)cos4xdx，N=∫-π/2π/2(sin3x-t-cos4x)dx，P=∫-π/2π/2(x2sin3x-cos4x)dx，则有( )．

设M=∫-π/2π/2sinx/(1+x2)cos4xdx，N=∫-π/2π/2(sin3x-t-cos4x)dx，P=∫-π/2π/2(x2sin3x-cos4x)dx，则有( )．

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问题 设M=∫-π/2π/2sinx/(1+x2)cos4xdx，N=∫-π/2π/2(sin3x-t-cos4x)dx，P=∫-π/2π/2(x2sin3x-cos4x)dx，则有(          )．
选项 A、N＜P＜M
B、M＜P＜N
C、N＜M＜P
D、P＜M＜N
答案D
解析
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考研数学三

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