Determine all numbers at which the function is continuous
x² +58-36
f(x) =įx + 8x-9
if x -9
if x=-9
13
a. continuous at every real number except x - 1 and x = -9
b. continuous at every real number except x=-9
c. continuous at every real number except x = 1
d. continuous at every real number except x = -9 and x - 4
select the best answer from the choices provided