Here a=2, c=9

I need handwritten pls and fast

Q4 (a) Find the domain and range of the following functions f (x) - ar-3 (1) f (x) = (ax2 + cy2 - 4)(-ax2- cy2 + 25) a- The first digit of your matrix number c- The last digit of your matrix number(b) Evaluate whether lim exist or not. Provide a prove if the limit does not (xx)- (0,0) (ax?+cy?) exist. a - The first digit of your matrix number c - The last digit of your matrix number