5,936 reputation
31752
bio website ophirgame.com
location United States
age 72
visits member for 3 years, 9 months
seen Dec 14 at 23:13

(update) - My board game was funded on Kickstarter last summer (~$28500)!


I hereby commit to contributing to this site without any rudeness, sarcasm, accusation, or any other unloving speech. (In contrast to The Chaz 1.0)


Nov
19
comment Fundamental Theorem of Trigonometry
Unless you're feeling particularly stingy with your mouse clicks, you can give a "check" to comments...
Nov
16
comment Why can't you square both sides of an equation?
Oh please - anything but that...
Nov
16
comment Proving Fermat's last theorem
I think the proof is in one of the "Related" links -->
Nov
15
comment Evaluating the Average value of f(x)
$\ln$ is an antiderivative of $1/x$.
Nov
14
comment Who is our hero?
Arturo is my hero!
Nov
14
comment What is the square root of 1 cm
What unit equals a meter when squared?
Nov
14
comment How many positive 4-digit integers are there?
@Atul: for someone with a profile that says "please delete me", you sure are active!
Nov
14
revised The tangent to the curve $y=x^2+1$ at $(2,5)$ meets the normal to the curve at $(1, 2)$
added 14 characters in body
Nov
14
comment The tangent to the curve $y=x^2+1$ at $(2,5)$ meets the normal to the curve at $(1, 2)$
Of course! Time for more coffee :)
Nov
14
answered The tangent to the curve $y=x^2+1$ at $(2,5)$ meets the normal to the curve at $(1, 2)$
Nov
13
comment Prove that $n^n$ is not divisible by $n!$
If two numbers don't have the same divisors, then they are not equal.
Nov
13
comment How dividing a number with 5 gives no. of multiples of 5 from one till that number?
Granted, the OP asked of this would work for any number, so maybe it's worth keeping!
Nov
13
comment How dividing a number with 5 gives no. of multiples of 5 from one till that number?
There are twelve numbers "between" $1$ and $12$...
Nov
13
comment Puzzle with some sort of math meaning to it?
I vaguely remember seeing something like this graph, but it was for testing divisibility by (some certain number). Does anyone now what I'm referencing/forgetting?
Nov
13
comment Algebraic solution to: Do the functions $y=\frac{1}{x}$ and $y=x^3$ ever have the same slope?
@Dom. Not necessarily. Consider "X"
Nov
13
comment How to tell if a function is onto or one-to-one
How many natural number have a square of $4$? How many integers have a square of $4$? I mean, one glaring difference between Z and N is the negative numbers...
Nov
13
comment Increasing and Decreasing Functions
You can do it, but can you explain it???
Nov
13
comment Transcendence of $\sqrt{\pi}$
See this? en.wikipedia.org/wiki/Gelfond%E2%80%93Schneider_theorem
Nov
13
answered Use partial fractions to find the integral.
Nov
13
comment Describing relations
@anon: so the Socratic method works!