I have never felt so lost in my life, so far. Hopefully someone can help.
The section is on "The Precise Definition Of A Limit"
Suppose that and , where is a real number. Prove each statement.
Am I supposed to use the triangle inequality? I think that if someone can help with problem (a), then I should be able to figure out the rest. Thanks!
Then I suggest you read the following proofs about the properties of limits.
Pauls Online Notes : Calculus I - Proof of Various Limit Properties