NEED HELP ASAP WILL GIVE BRAINLIEST

Which facts are true for the graph of the function below? check all that apply. f(x) = log8 x. (30 points pls )

For what values of a is the sum of the fractions 2a−1 / 4 and a−1 /3 positive?

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?