Question

if f(x)=log(5+4x-x^2) then range is​

Answer 1

Answer:

5 + 4x - x^2 = 9 - (x^2 - 4x + 4) = 9 - (x-2)^2. This expression lies between 0 and 9. The answer: -infinity to log9, since log x increases on R.