Maths journals?

Where have they all gone, I miss them :(
Comments
104
5+5*5-5=
I know the answer!
Parent
NICE!!!111
So you actually visited the 4th grade.
Nice to know
Parent
WITHOUT THE BRACKETS I JUST DONT KNOW WHAT TO DO
Parent
windows calc says 45 :DD
Parent
windows calculator doesn't knows the priority rule
Parent
wtf? how can it made :DDDD
Parent
5x5 / 25
They have math in Australia?
1+2+3+5+8+13+21
meez was watching anime, he's done now so we can expect them to be making a return shortly
it's almost 2 in the morning, and you want maths journals?
hes from Australia :D
Parent
dont tell me its summr there !!!!!!!!!4444444444
Parent
niec gaypic in ur profile
Parent
yeah i know, gay pride! (A) <3
Parent
its actually 0 in F2
Parent
Binary is 2pro4crossfire it seems..
Parent
tan 90+k180 = ERROR (in deg)
tan 100+k200 = ERROR (in gra)
tan pi/2+kpi = ERROR (in rad)

K is an element of Z
Haha, but what does the error actually mean?
Parent
it means that there is no value for that particular tangens
Parent
coz its very very big then ;)
Parent
u have a pol on for those angles,
this is why tangens isnt defined here,
but still u can consider those points as limits of sequences which goes ins unlimited
Parent
What do you mean by a "pol"?

Also, "coz its very very big then ;)" simply is a wrong explanation.
Parent
i dont always try to explain it a very correct way, even if my explanation have the right part.
This is why i had ;) at the end.
My last answer was corrrect.
Pol is a place, where to the point belongs an unlimited big number.
For example 1/|x| has a pol on 0, coz there the function has the number unlimited.
(dunno if "pol" the right word in english, at least its in german so :) )
Parent
[(k1*bps+(k2*bps)/(256-L)+k3*D)*k5/(k4+R)]*256 = ?
so can someone name all Fermat Primes ? :P

e: without wikipedia :<
ok here a task: imagine u ar in the forest and u will be attacked by 4 wolfs.
Assume u have 5 cartridges (means u can do only 5 shots), and ur shooting accuracy is 80 %.
1. Whats the probability, to kill the last wolf with the last cartridge?
2. Whats the probability to survive the attack of wolfes?
buble and they will change target, most likely they will attack domi and he will die and i will pwn them
Parent
statistics isnt math
Parent
this is not statistic
Parent
probability is statistics not core/pure
Parent
statistic uses probability, but statistics is something different as probability theory
Parent
1. Apparently we assume that u have killed the other wolves and have 1 wolf and 1 round left, then it's 80% (Or do u mean the probability that we get into a situation where u got 1 wolf and 1 round left?)
2. 1 - (0,2 + 0,8*0,2 + 0,8*0,8*0,2 + 0,8*0,8*0,8*0,2) = 0.41 (or just 0,8^4 = 0.41)
Parent
sec, have to understand what u wrote :D
Parent
2nd answer is wrong. U didnt use the case, to kill the 4th wolf with the last 5th cartridge
Parent
dunno if i understand u correctly, u should assume, that u can shoot 5 times, where ur accuracy to hit in every shot is 80 %, and u have to kill the 4th wolf with last (means 5th) cartridge
Parent
u never said that I should use all the bullets :o ?

but u are right I should add there like 0,8^4 + 4* 0,8^4*0,2 = 0,74
because I can miss one bullet
Parent
i said it: "Assume u have 5 cartridges (means u can do only 5 shots)"
Parent
so u aren't allowed to do it with 4shots?
Parent
lol :) u can kill all wolfes with 4 shoots of course, but if u fail by anyone shot, u have only 5th last cartridge for killing the 4th wolf
it was meant u can shoot maximal 5 times. If u hit is another question
Parent
0,8^4*0,2 is not enough. U miss here something :)
Parent
yay, edited !
Parent
my more correctly answer is 0,7373 do u get the same?
Parent
0,73728 to be exact :)
Parent
got more of these ?
I could do still one more now, then I'll study for my exam :p
Parent
study at this time? :o
Ill post one now, dunno if u will able to solve this, sec
Parent
yea, I always study at nights because I'm too lazy to do that in day time xd

ok, I'll check the exercise now
Parent
hopefully u sleep too ;)
the task is very easy if u know what is a negative binomial distribution
Parent
I've heard about it but dunno if I remember much... anyway I'm not sure if I understand what u are asking there :)
Parent
i think without it its very difficult to solve the task
Parent
1/5 you miss the first shot, 1/25 you miss the second shot as well, 1/125 you miss the third shot as well, 1/625, you miss the 4th shot as well, 1/5^5, you miss the last shot as well

So , it's 4^5/5^5 ?

aka 0.33
Parent
i dont understand ur solution sorry
Parent
lol

4 shots out of 5 that you hit him each time right ?

80%

so you have 5 shots , hence power 5

np
Parent
that's to math as my ass to jlo's ass.
Parent
[1-5]*[5-5]=1
here we go...

solve this:

INTEGRAL[e^t * sin(t) - 2t * cos(t)]*dt over 0 to 2 Pi
-267.246

I won't bore u with the details.
Parent
just drawed it on my TI-86 and made it calculate it as well :)

but I'll look into it if I got time... the first term can be Derived from 1/2*e^t(sint-cost) but haven't figured the 2nd one yet :p
Parent
That's basically t * cost when you take -2 out of the integral (it's a constant), and you'll get t * sint + cost.
Parent
ah ye u are right, I thought something more complex although I didn't put a lot thought on that one :p

it even gives the right answer when u insert the values:
F(t) = 0,5*e^t(sint-cost) - 2*(t sint + cost)
F(2Pi) - F(0) = -267,24583
Parent
Of course it does. :D
Parent
had to solve that one by hand without any calculator in my last exam...
Parent
I have had harder ones as well :)

what do u study btw?
Parent
physics...

ye i know i also have harder ones, but that one made me sweat last exam cuz i failed and had to do it 3 times :DD

took a fucking hour of testtime :DD
Parent
I study advanced engineering, actually electronics, but I have the large courses in physics, maths and IT so I got the same stuff as u I guess :)
Parent
have u done how to integrate a not riemann integrals? for example lebesgue?
Parent
some, but I didn't study them very well, only so that I passed the course :)
Parent
20 / 0 =

yeah I did it!
imagine u try to arrive a callcenter. The probability to arrive a callcenter of every of ur trials is 0.6.
How much trials do u need in the average to arrive a callcenter?
image: 2fcbac714d01f8b127d8531b1dc83dca

If I understand it right I should use this formula?
Parent
yes! xD
What do u have to use for r?
Parent
that's my problem I guess, didn't figure that out... watching the examples I would put there just 1, but doesn't sound that rational :p
Parent
yes, r should be 1 coz of ur situation, and this is exactly the geometrical distribution.
Ok u have 1-p/p. This gives u the expectation/average of the number of the trials before u get the call. And that means, the expectation is at 1/p=1,6667th call
==> the average arrive number is 1,6667

ok i go sleep bb
Parent
ok, bb

I go study for my exam now :P
Parent
One out of 1.666... trials is a success. Therefore you need an average of 1.666... attempts.
Parent
inf-inf=
0^0=
inf^0=
inf/inf=
0/0=
0*inf=
1^inf=

hf
uncertainty
0
1
uncertainty
uncertainty
0
1
Parent
they all are indeterminated
Parent
you need the rules of del hospital to solve these
Parent
there is nothing to solve coz of no functions by inf.
And there ar no limites for using del'hospital
Parent
But if they're an expression and not explicitly stated as 0 or inf, you can use l'Hopital and find the limit :D
Parent
yes, but he wanted some true math problem to solve... if he knows how much is 0^0 for example - Nobel prize incoming xD
Parent
1^inf should be easy to prove to be = 1 using induction..

1^x = 1 for x = 1

Assuming 1^n = 1. Need to prove it for 1^(n+1)

1^(n+1) = (1^n)*1 = 1^n which by our assumption is 1.

This means that 1^x = 1 for all x.
QED
Parent
u have shown this for natural number x, not for a real one
Parent
true! omg -_-
But hey, at least it holds for all natural numbers!
Parent
maths gives aids
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