The domain of the function f(x) = square root -x^2+9x-8 cosists of one or more of the following intervals : (-infinity, A], [A,B] and [B, infinity) where A< B

Find A:_______

Find B:_______

For each internval, anwser YES or NO to where the interval is included in the solution.

(- infinity, A] :____

[A,B] :_____

[B, infinity): _____