Answer 1

does not exist.

Answer 2

can u explane why?

Answer 3

x approaches 1 1 from both sides on the line..

for x<1, write x as (1-h) where h is a qty gr8er thn 0

the lim bcomes 6/h

for x>1 , write x as (1+h)
the lim reduces to -6/h

If you reduce h to zero the two result in numbers that are in each case largely positive, negative. thus they dont approach each other to a number. So in the limit it doesnt reduce to one answer, which is why the limit does not exist. :)