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( )．

admin2022-10-25 105

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

选项 A、N＜P＜M
B、M＜P＜N
C、N＜M＜P
D、P＜M＜N