
1. 
f is continuous at xo and
(For all E>0 there exists D>0 s.t.
xxo<D and f(x)f(xo)>E for all x)


2. 
f is continuous at xo and
(There exists E>0 s.t. for all D>0,
there exists x s.t. xxo<D and f(x)f(xo)>E)


3. 
f is continuous at xo and
(There exists E>0 s.t. for all D>0,
there exists x s.t. xxo>D and f(x)f(xo)>E)


4. 
f is continuous at xo >
(There exists E>0 s.t. for all D>0,
there exists x s.t. xxo<D > f(x)f(xo)>E)


5. 
f is continuous at xo >
(For all E<0, there exits D<0 s.t.
xxo<D > f(x)f(xo)>E for all x)
