Just looking at (a) because if I understand (a), I can do (b)The second part of a.... -f(x/2).... I know it is a 2-step process to get a value of -6 but I need further explanation on how to get the value -6 or 6, whatever the case may be

lim f (x) = -1 x-2 lim f (x) = 6 lim f (x) = 2 lim f (x) = -3 x-1 X-4 x--2 a. lim (f ( 2x ) - f ( = ) b. lim 2 x-2 = x- 2 (-x) 2 - 6 3 opposite of " ( = 4 ) limit so X - - 2