Study = Don't Fail?

Interesting?

8 vote(s)
57.1%
2. Hell no so boring!

6 vote(s)
42.9%
1. Sep 14, 2006

Delzac

Hi all,

Just some interesting stuff to share.

Study = Don't Fail--------(1)
Don't Study = Fail--------(2)

Study + Don't Study = Don't Fail + Fail

Factorising the equation,

Study(1+Don't) = Fail(1+Don't)

Study = Fail !??!?!?!

:P

Delzac

2. Sep 14, 2006

Gokul43201

Staff Emeritus
Dividing (1) by (2)
study/(don't study) = (don't fail)/fail
Hence 1/(don't) = don't
Or don't =1 or -1

If don't = -1
1+don't = 0
Division by 0 is illegal.

If don't =1 (the multiplicative identity), then (1) and (2), both become: study=fail,
which is not inconsistent with the final result.

Last edited: Sep 14, 2006
3. Sep 14, 2006

Delzac

lol didn't notice thx for the note

4. Sep 14, 2006

Delzac

hmm.........if Don't = 1 then it takes the fun out of things already, but is can't be -1 also...zzzzz i will try think of a better equation. ^^

5. Sep 14, 2006

ZapperZ

Staff Emeritus
Try this one (which is a rather old "puzzle")

1 = sqrt(1) = sqrt(-1*-1) = sqrt(-1)*sqrt(-1)=i*i=-1

so 1 = -1 !!

[Now before people jump all over me on that, I KNOW where the fault is].

Zz.

6. Sep 14, 2006

Mech_Engineer

I've got a good one:

Women = Money * Time

Time = Money (Time is money!)

Women = (Money)^2

Money = sqrt(Evil) (Money is the ROOT of all evil...)

So, Women = Evil

Of course I've known this all along, I just have a mathematical proof of it now :rofl:

7. Sep 14, 2006

Delzac

Nice one mech, how very true.

Anyway referring back to zapper, something must be wrong, but i just can't a hand to it. take this for example.

1 = sqrt(1) = sqrt( -1*-1) = sqrt( (-1)^2 ) = (-1)^(2/2) = -1 ?!?!

For now i can't solve, i will get back to you later.

8. Sep 14, 2006

Gokul43201

Staff Emeritus
The answer is simple, and exemplified by shortening the process some:

-a = sqrt(a^2) = a

9. Sep 14, 2006

Delzac

hmm.........here's my initial thought.

X = sqrt ( (+-x)^2 ) there is something wrong with this step right?

10. Sep 14, 2006

Gokul43201

Staff Emeritus
Yes, it's like saying: 0 = inv. sin (0) = pi

The square root (like the inverse sine) is not strictly a function, because it is a one-to-many mapping (functions, strictly, are may-to-one, or one-to-oe maps). These are sometimes, loosely called multiple valued functions, with the condition that a principal value is assigned to the image (like the positive square root) when it's not specified which image you are talking about.

11. Sep 14, 2006

theCandyman

Hahaha! That has to be one of the best replies to a joke I have ever heard.:rofl:

12. Sep 14, 2006

Delzac

can i also solve the problem by saying that: 1 = sqrt ( (-1)^2) = l -1 l = 1

is this explaination valid?

13. Sep 14, 2006

Mk

I think some of you are spending too much time on turning words and phrases into mathematical shenanigans.

14. Sep 15, 2006