Reputation
1,497
Top tag
Next privilege 2,000 Rep.
Edit questions and answers
Badges
1 7 14
Newest
 Yearling
Impact
~41k people reached

Feb
25
comment What makes a limit 'go away'?
$$\lim_{x\to ∞} f(x)+g(x) = \lim_{x\to ∞} f(x)+\lim_{x\to ∞}g(x) $$ when both limits exist. and $\lim_{x\to ∞} c = c$ so you can extract the $\frac{11}{7}$ from the limit and keep $\frac{e^x}{7}$ inside it.
Feb
6
comment Is it faster to count to the infinite going one by one or two by two?
it doesn't matter how far you count, you are always just as far from infinity than when you started.
Jan
15
revised How to fast convert from Octal to Hexadecimal
edited body
Jan
15
revised How to fast convert from Octal to Hexadecimal
added 103 characters in body
Jan
15
revised How to fast convert from Octal to Hexadecimal
added 103 characters in body
Jan
15
answered How to fast convert from Octal to Hexadecimal
Dec
13
comment Expand in factor when even and odd power is given
for $n=2$ there is no factorization unless you go with imaginary numbers $(A+Bi)(A-Bi)$
Dec
10
answered $1/i=i$. I must be wrong but why?
Dec
6
answered Prove by induction that $5^n - 1$ is divisible by $4$.
Dec
6
comment Prove by induction that $5^n - 1$ is divisible by $4$.
@user17762 $25 * 5 = 25 \mod 100$
Dec
2
revised What is the purpose of the first test in an inductive proof?
mathjax fixin
Dec
2
suggested approved edit on What is the purpose of the first test in an inductive proof?
Nov
18
comment if matrix such $AA^T=A^2$ then $A$ is symmetric?
$AA^T=AA \Rightarrow A^{-1}AA^T=A^{-1}AA\Rightarrow A^T=A$
Nov
11
answered Measuring water puzzle
Nov
9
awarded  Student
Nov
9
revised How stable is my quaternion interpolation?
added 6 characters in body
Nov
8
asked How stable is my quaternion interpolation?
Nov
6
comment How can I determine that a relation lacks a property without using a counterexample?
you can try to find a contradiction with the assumption that the property holds for all, this proof by contradiction will also allow you to construct a counterexample
Oct
31
answered Exponential equation in x,y,z
Oct
26
comment What is the simplest proof of the pythagorean theorem you know?
@KeshavSrinivasan moreover it's easy to create a contraption like that in real life that proves $a^2+b^2$ is greater or less than $c^2$ by adjusting the depth