- #1

TitoSmooth

- 158

- 6

x->3

My work so far. For every ε>0 there is a δ>0 such that

if 0<|x-3|<δ , Then |x^2-9|<ε

so, |(x-3)(x+3)|<ε

|x-3|* |x+3|∠ε

what do I do from here? My book is not very clear (Stewart Calculus 7ed) on how to do episolon/delta tolerance proofs on not so nice functions.

please help me.