i need to prove or disprove these statements:
a. if the series is convergent, then is divergent.
a. if the positive series is convergent, then is convergent.
if the statement is false, i need an example of contradiction.
basically i can really use some tips about how to approach these questions;
what tests should i use to determine if a statment is true or false (or maybe the first step should be merely my intuition), and in what ways can i prove it?
thanks in advanced!