解f(x)=2sin²x+2sinxcosx=2sinxcosx-(1-2sin²x)+1=sin2x-cos2x+1=√2(√2/2sin2x-√2/2cos2x)+1=√2(sin2xcosπ/4-cos2xsinπ/4)+1=√2sin(2x-π/4)+1∴最小正周期为：T=2π/2=π∵sin(2x-π/4)∈[-1.1]∴...