f(x)=(√3/2)sin2x-cos²x -1/2
=(√3/2)sin2x -(1+cos2x)/2 -1/2
=(√3/2)sin2x -(1/2)cos2x -1
=sin(2x-π/6) -1
從而 最大值為 M=0,最小值為m=-2
于是 M-m=2
已知函數(shù)fx=2分之根號3sin2x-cos平方x-2分之1,x屬于R,其最大值為M,最小值為m
已知函數(shù)fx=2分之根號3sin2x-cos平方x-2分之1,x屬于R,其最大值為M,最小值為m
則M-m等于?
則M-m等于?
數(shù)學(xué)人氣:842 ℃時間:2020-05-25 02:16:51
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