f(1)=log(2)(a-3b)=1∴a-3b=2f(2)=log(2)(a^2-4b^2+b)=log(2)50∴a^2-4b^2+b=50把a=3b+2代入式中,得：9b^2+12b+4-4b^2+b=505b^2+13b-46=0(5b+23)(b-2)=0∴b=2∴a=8f(x)=log(2)(2^3x-4×2^x+2)令t=2^x>0f(t)=log(2)(t...