函數(shù)y=7/4+sinx-(sinx)^2的最大值是
函數(shù)y=7/4+sinx-(sinx)^2的最大值是
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數(shù)學(xué)人氣：587 ℃時間：2020-04-13 05:36:54
優(yōu)質(zhì)解答
函數(shù)y=7/4+sinx-(sinx)^2的最大值,y=-[(sinx)^2-sinx-7/4]=-[(sinx-1/2)^2-1/4-7/4]=-(sinx-1/2)^2+2,因為 (sinx-1/2)^2的最小值是 0,故 y=-(sinx-1/2)^2+2 的最大值是 2.解二：y'=conx-2(sinx)conx=conx(1-2sinx),...
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