f(x) = sinx+cosxf'(x) = cosx -sinx= √2((1/√2)cosx - (1/√2)sinx)= √2(cos(x+π/4))f'(x) 的最小正周期 = 2πy-f'(x)=sinx+cosx -(cosx-sinx)=2sinxy-f'(x) 的最小正周期 = 2πF(x)= f(x)f'(x)+[f(x)]^2=(sinx...