mahts help

16 replies [Last post]
SHYONE!·SOUL·
eTTe's picture
Offline
Joined: Oct 2005
Posts:

heya guys, i have a problem, maybe, some of you can help me, i have to make an excelsheet in maths for some calculations
i should also draw a graphic
it is called Integral - "Obersumme und Untersumme"
it has something to do with f(x)=x² Big grin
maybe someone of you can help me, if more details are needed, just tell me, thx for help in advance

shy1

...

-C4-TYRANTuk.tyrant
Offline
Joined: Sep 2005
Posts:
mahts help

i guess it depends what x is like most maths Smug

so...if f(x)=x² then f must = x so u have a straight line gg

~tyrant!~ZoO.ConcreteDonkey

*A*C|_ASS*WON]<O
vroomfoondel's picture
Offline
Joined: Jul 2006
Posts:
mahts help

hmm. well from what i can see its basically just a way to plot the integral of x^2. unless its a graphical method to calculate integrals. (which is not all that complicated).

but before i can go further, i need u to translate the ubersumme and untersumme for me. infact it mite just be better to post a precise translation of the entire question/problem.

ps: tyr, its more likely he has to plot the integral of f(x), where the function is x^2. even if it was integral of f(x) = x^2, the answer would be 2x not x.

#e+pickup #excessiveplus #class.clan

SHYONE!·SOUL·
eTTe's picture
Offline
Joined: Oct 2005
Posts:
mahts help

hmm, thx for helpt, i think the obersumme and untersumme is the sum over and under the line which rises from left bottom to right top, damn, i am so bad in maths....

...

gen.X.SuperBo!
Offline
Joined: Sep 2003
Posts:
mahts help

Lets see if I remember the mathlessons. I am not sure this is right, but this is how I remember it Happy

The integral of x^2 is not 2x. 2x is the derivate of x^2, integral is the other way around. x^2 is the integral of 2x + C (any constant to find out how much above the y=0 line the curve is).

since the derivate of Ax^y + C -> A*yx^y-1 (the constant is removed) then you have to find out what the function to calculate the derivate from would look like to get x^2

I think like this

x^2 = Ax^y where A=1 and y=2

So first you have to add 1 to y which gives Ax^y+1 = x^3
Then you have to figure out what number to multiply with A to get 1 which is 1/3

So f(x) = x^2 gives the integral A*1/3*x^3 + C (You remove the C when you derivate so you have to add it to the integral)

x^3 + C
3

*A*C|_ASS*???2JR
nic4evercool's picture
Offline
Joined: Apr 2006
Posts:
mahts help
SuperBo! wrote:

Lets see if I remember the mathlessons. I am not sure this is right, but this is how I remember it Happy

The integral of x^2 is not 2x. 2x is the derivate of x^2, integral is the other way around. x^2 is the integral of 2x + C (any constant to find out how much above the y=0 line the curve is).

since the derivate of Ax^y + C -> A*yx^y-1 (the constant is removed) then you have to find out what the function to calculate the derivate from would look like to get x^2

I think like this

x^2 = Ax^y where A=1 and y=2

So first you have to add 1 to y which gives Ax^y+1 = x^3
Then you have to figure out what number to multiply with A to get 1 which is 1/3

So f(x) = x^2 gives the integral A*1/3*x^3 + C (You remove the C when you derivate so you have to add it to the integral)

x^3 + C
3

I was gonna say that Big grin Laughing out loud ... Just 1 thing, make sure to plot x^3/3 + C and not f(x) = x^2. Basically an integral in the area under the curve Happy and the derivate is the tangent point of 1 curve... so if u r going to plot it make sure to put some shade under the curve, only put shade until the shade touches the axis ( x,y) ...peace...



*A*C|_ASS*???2JR wrote:
Sex is a sensation caused by temptation of a guy sticking his location into a girl's destination to increase the population of the next generation. Do you understand my explanation or do you need a demonstration? Big grin ...peace...

*A*C|_ASS*WON]<O
vroomfoondel's picture
Offline
Joined: Jul 2006
Posts:
mahts help

nicely argued. except u havent touched upon the fact that its a fixed integral with limits, and ur supposed to plot the function not the area. unless otherwise mentioned.

as i said. if u have the problem statement, have it translated and post it. its not that hard a problem. but without knowing the exact statement, ur probly gonna interpret it wrong and fuck it up. Happy.

#e+pickup #excessiveplus #class.clan

*A*C|_ASS*???2JR
nic4evercool's picture
Offline
Joined: Apr 2006
Posts:
mahts help
*A*C|_ASS*WON]<O wrote:

its not that hard a problem. but without knowing the exact statement, ur probly gonna interpret it wrong and fuck it up. Happy.

hehe yeah Happy. And ur gonna blame Q3 people for making u fail on ur test Big grin Laughing out loud Big grin ...peace...



*A*C|_ASS*???2JR wrote:
Sex is a sensation caused by temptation of a guy sticking his location into a girl's destination to increase the population of the next generation. Do you understand my explanation or do you need a demonstration? Big grin ...peace...

2!S*LEUKOTHEA!
Leukothea's picture
Offline
Joined: Feb 2006
Posts:
mahts help
SuperBo! wrote:

Lets see if I remember the mathlessons. I am not sure this is right, but this is how I remember it Happy

The integral of x^2 is not 2x. 2x is the derivate of x^2, integral is the other way around. x^2 is the integral of 2x + C (any constant to find out how much above the y=0 line the curve is).

since the derivate of Ax^y + C -> A*yx^y-1 (the constant is removed) then you have to find out what the function to calculate the derivate from would look like to get x^2

I think like this

x^2 = Ax^y where A=1 and y=2

So first you have to add 1 to y which gives Ax^y+1 = x^3
Then you have to figure out what number to multiply with A to get 1 which is 1/3

So f(x) = x^2 gives the integral A*1/3*x^3 + C (You remove the C when you derivate so you have to add it to the integral)

x^3 + C
3

this is right.

i just finished doing integrals and derivates Thinking
thank god its over. yuck. :pukeleft:


Sug min fitta.
Join irc channels: #2!Sweet | #m0ve | #e+pickup

SHYONE!·SOUL·
eTTe's picture
Offline
Joined: Oct 2005
Posts:
mahts help

thx for help, got it Big grin

cu shy1

...

-C4-TYRANTuk.tyrant
Offline
Joined: Sep 2005
Posts:
mahts help

omfg my maths was so much easier go away nerds Cool

~tyrant!~ZoO.ConcreteDonkey