(2)f(3)+f(4-8x)= f[(3)*(4-8x)]& gt； 2 f(2)= 1，f(2)+f(2)=2，f[(3)*(4-8x)]& gt； F(2)+f(2)=f(4), f( 12-24x)>F(4), and f(x) is increasing function, so12-24x > 4，x

2, odd function, f(-x)=-f(x), into the function.

Get b=0, and then multiply x= 1/2 into the function to find a.