If f(x)=logb(x)f(x) = \log_b(x)f(x)=logb(x), which of the following is true for all x,y>0x, y > 0x,y>0?
f(x)+f(y)=f(x+y)f(x) + f(y) = f(x+y)f(x)+f(y)=f(x+y)
f(x)+f(y)=f(xy)f(x) + f(y) = f(xy)f(x)+f(y)=f(xy)
f(x)−f(y)=f(x/y)f(x) - f(y) = f(x/y)f(x)−f(y)=f(x/y)
Both b and c are correct.