Which of the following statements is equivalent to the assertion 
Explain.
a) For every ϵ>0, the interval (L−ϵ,L+ϵ) contains at least one element for the sequence {an}.
b) For every ϵ>0, the interval (L−ϵ,L+ϵ) contains all but at most finitely many elements of the sequence {an}.