prove that by epsilon deltacant understand why he choose such x

defintion.

we need to prove that their is so for every

their is x and

so we are free to choose our epsilon and our x

i choose

x cannot be equal to -1 because of the denominator.

and we need to choose x for which

-> ->

-> ->

but x=-1 there so we have a problem.

where is the problem in my way???

the prof solved it by