g(x)定义域1≤x≤4 1≤x^2≤4解得1≤x≤2g(x)=-[f(x)]^2+f(x^2)=-(3+log(2)x)^2+3+log(2)x^2=-(3+log(2)x)^2+3+2log(2)x令log(2)x=t 1≤x≤2则0≤t=log(2)x≤1=-(3+t)^2+3+2t=-t^2-4t-6=-(t+2)^2-2对称轴t=-2则在t∈...