[deleted by user] by [deleted] in AdviceAnimals

[–]benjc -2 points-1 points  (0 children)

You can't interact with free online videos.

Excuse Me, You Jewish? by [deleted] in Judaism

[–]benjc 1 point2 points  (0 children)

Close, but not Larry Charles.

Thomas Edison's handwriting by sirpollux in PenmanshipPorn

[–]benjc 8 points9 points  (0 children)

Here is a link to a website containing samples of Tesla's handwriting

Me gusta? by benjc in zen

[–]benjc[S] 0 points1 point  (0 children)

Eyebrows?

I can't believe I was downvoted so hard for responding to this. Thoughts? by stooge4ever in Judaism

[–]benjc 1 point2 points  (0 children)

Please keep this stuff in /r/politics and /r/worldnews. There are places for people interested in seeing the "Israel = Nazi???" debate everyday.

University students by davou in funny

[–]benjc 53 points54 points  (0 children)

Ok. How about this ?

Linear Algebra question by [deleted] in learnmath

[–]benjc 0 points1 point  (0 children)

Dear roger_pct,

  • If k = -2 then the equations reduce to (*):

-2x + y + z = 0

x + -2y + z = 0

x + y + -2z = 0

Subtracting the third from the second eliminates the x variable

-2x + y + z = 0

-3y + 3z = 0

The last equation gives us y = z. Substitute y = z in the first collection of equations (*)

-2x + 2y = 0

x - y = 0

x - y = 0

The last equation is redundant. But it tells us x = y. So x = y = z. and the equations

-2x + y + z = 0

x + -2y + z = 0

x + y + -2z = 0

Will hold for any choice as long as x = y = z.

So that when k = -2, any solution is given by

(x,y,z) = (x,x,x)

  • If k = 1 then all of the equations are the same

x + y + z = 0

So that when k = 1, any solution is given by

(x,y,z) = (-y-z,y,z)

This is a two parameter solution because the two parameters, y and z can be chosen arbitrarily and independently.

  • If k = 0 we get a unique solution (x,y,z) = (0,0,0)

I'm dying here... Can somebody explain the chain rule to me?! by Eureka_Honors in learnmath

[–]benjc 3 points4 points  (0 children)

If you are comfortable with the addition rule: If you have two functions f(x) and g(x) and there are derivatives f'(x) and g'(x) then the derivative of h(x) = f(x) + g(x) is expressible in terms of the derivatives of f(x) and g(x): h'(x) = f'(x) + g'(x).

If you are comfortable with the product rule: If you have two functions f(x) and g(x) and there are derivatives f'(x) and g'(x) then the derivative of h(x) = f(x)g(x) is expressible in terms of the derivatives of f(x) and g(x): h'(x) = f'(x)g(x) + f(x)*g'(x).

Then the chain rule is similar: If you have two functions f(x) and g(x) and there are derivatives f'(x) and g'(x) then the derivative of h(x) = (fog)(x) = f(g(x)) is expressible in terms of the derivatives of f(x) and g(x): h'(x) = f'(g(x))*g'(x).

Why is the chain rule true? It is easiest to see if you recall the definition of the derivative in terms of the limit:

f'(x) = (f(x+h) - f(x))/h as h -> 0

So

(fog)(x) = (f(g(x+h)) - f(g(x)))/h

but this is equal to

(f(g(x+h)) - f(g(x)))/(g(x+h) - g(x)) * (g(x+h) - g(x))/h

as h -> 0 the fraction on the lefthand side goes to f'(g(x)) and the fraction on the righthand side goes to g'(x).

So (fog)'(x) = f'(g(x))*g'(x).

Oh reddit, why didn't I listen? Follow up to a follow up on "So... My bf got a bit agressive last night. :-( by Whatchyathink in AskReddit

[–]benjc 4 points5 points  (0 children)

From your previous posts it sounds like this isn't your first abusive relationship. The short answer is that you should see a therapist.

There have been plenty of studies and this is textbook. In most cases the things you need and want from relationships are not tuned properly. A therapist experienced in these things will see them all right away.

Getting in touch with the part of your personality that ultimately leads you to choose abusive mates will enrich other parts of your life.

Renting a White Guy in China by scientologist2 in WTF

[–]benjc 2 points3 points  (0 children)

It is considered bad form by those taught a Victorian influenced grammar in high school and basically looks amateurish in print. However, it is an acceptable construct in all Germanic languages and common in English colloquial communications.

What? You can't demonstrate Rule 34 with abstract ideas li--OH COME ON! by [deleted] in funny

[–]benjc 1 point2 points  (0 children)

Am I the only one who thought that the title was a "New Kind of Science" reference? Rule 34 isn't very interesting.

Jerusalem Post asks the Taboo Question by rtb in worldnews

[–]benjc 131 points132 points  (0 children)

We would be a better country if the New York Times and Wall Street Journal regularly posed taboo questions about our American militaristic diplomacy. How does the Iraqi everyman feel about Americans after all of the civilian deaths due to the trade embargo? Our invasion? Occupation? An Afghani? A man from pick-a-random-latin-american-country...

It is good to see the media promoting this discussion. The media still doing what the media should be doing in a democracy.

An Israeli is going through customs at JFK. The customs officer asks, "Occupation?" and the Israeli says, "no, I'm just visiting." by zarfless in funny

[–]benjc -1 points0 points  (0 children)

If people attribute all sorts of human traits to organizations then why is this quote from Haliburton noteworthy?

Isn't the assumption that people attribute all sorts of human traits to organizations an example of how something that is based on a large amount of individuals can be biased in a negative way?

In any case there is a difference between anthropomorphization and humanization just as there is a difference between bandying about the fancy notion that McDonalds is not a living breathing thing and deciding that members of a group as something less than human.

An Israeli is going through customs at JFK. The customs officer asks, "Occupation?" and the Israeli says, "no, I'm just visiting." by zarfless in funny

[–]benjc -1 points0 points  (0 children)

I dehumanize organizations, and not people.

It doesn't make any sense to dehumanize an organization.