How to proove the following?
13291
Proving $\sum_{k=1}^n\frac1{\sqrt k}<2\sqrt n$ by induction
103568
Possibility of finding a such function?
34085
Need answer to an "if" question
103310
Evaluation of the following expression
38100
How do you manipulate this in 2D
146786
How do I solve these absolute value equations?
108360
How to do this the fastest way?
36399
Find the limit of following
91684
Prove the following equation(much needed help):
132941
How to TeX like this
71360
How do I represent the following equations
36478
How can I solve this problem without having to do it by hand?
69173
How to describe two different objects?
157213
Application of Luca's theorem
51049
Hi there! I'm looking for a help drawing this diagram. Any ideas?
120510
How to write this statement in mathematical notation?
110327
How to do this question that talks about dependency of x