Calculus

[dmcoco84 5]

IT F*****G SUX!

Anyone a Math Wiz and can help me out!? I'm past limits and finding derivatives. I am working on the product and quotient rules.

PR - (t-1)(2t-1)

QR - 1/(x-2)

I've got the answer from the back but don't know how to find them. Any help?

[windcatcher 0]

you said the C* word!!!!!!!



I HATE MATH!!!!!!!

Mother to the cutest little thing in the world...

[mailin 0]

Can't you solve PR by using the FOIL method

First
Outside
Inside
Last?

(t-1)(2t-1)
F - 2(t square)
O- (negative)t
I - (negative)2t
L - (postive) 1

Don't feel like taking the time to find my old books to solve your QR question - so good luck with that


Jen

Arianna Frances

[azureriders 0]

if you are just looking for the product of the two numbers you should be able to use foil. I solved the physics problem, but unfortunately I dropped out in the middle of calculus. Had a strong B too, what a shame.

[dmcoco84 5]

Nope can't use foil that doesn't give you the derivative

[MrBrant 0]

  Quote

IT F*****G SUX!

Anyone a Math Wiz and can help me out!? I'm past limits and finding derivatives. I am working on the product and quotient rules.

PR - (t-1)(2t-1)

QR - 1/(x-2)

I've got the answer from the back but don't know how to find them. Any help?

Hint: 1/(x-2) = (x-2)^-1

[mcneill79 0]

PR: (t-1)(2t-1)

First * derivative of second + second * derivative of first
(t-1)*2 + (2t-1)*1
2t-2+2t-1
4t - 3

Edited to add:
You could use FOIL and then take the derivative of each term and get the same answer

QR: 1/(x-2)

denominator * derivative of numerator - numerator * derivative of denomintor/denomintor ^2
(x-2) * 0 - (1) (1)/(x-2)^2
-1/(x-2)^2


Easier way to do that one is to say

(x-2)^-1
-1(1)(x-2)^-2
-1/(x-2)^2

[dmcoco84 5]

Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!Thank You!!!

[freeflynick 0]

Hmmm - its been a while, but doesn't (t-1)(2t-1) =
2t^2 - t - 2t + 1
= 2t^2 - 3t + 1 ??

I know I am probably missing something, so please explain what it is!!

Cheers!!

Hobbes: "How come we play 'War' and not 'Peace'?"
Calvin: "Too few role models."

[MrBrant 0]

  Quote

Hmmm - its been a while, but doesn't (t-1)(2t-1) =
2t^2 - t - 2t + 1
= 2t^2 - 3t + 1 ??

I know I am probably missing something, so please explain what it is!!

Cheers!!

That's the answer to the multiplication. Not the derivitive of the function.

• Quote

[peanut4040 0]

PR - (t-1)(2t-1)

QR - 1/(x-2)

F'(x) = Lim = (x+change in x) - F(x)
change x ..-->0-------------------------
change x

so,, (change in x + x) - F (t-1

awww hellll,,, i"m drunk,, Cant spell,, call me..

Its a good day to LIVE, why puck up a good thing.

There is no reply in aad section for. " hell no i would not put an AAD on my back"

[BillyVance 34]

Can't help ya... I failed Pre-Calculus.

My brother could help... He got an A in Calculus 1 in his Junior year in high school, A in Calculus 2 as a Senior, then Advanced Calculus in college. We're total opposites...

"Mediocre people don't like high achievers, and high achievers don't like mediocre people." - SIX TIME National Champion coach Nick Saban

[jasonRose 0]

Back in the day I used U subistution then just pluged into the qoutent or product rule. It takes a tad longer put the accuracy is usually better.

Have you learned the chain rule yet?? That makes things a little faster

Problem 1
Assuming
d/dt = PR - (t-1)(2t-1)

answer 3-4t


problem 2

assuming

d/dx= QR - 1/(x-2)

answer

1/(x-2)^2

Some day I will have the best staff in the world!!!

[jasonRose 0]

  Quote

PR: (t-1)(2t-1)

First * derivative of second + second * derivative of first
(t-1)*2 + (2t-1)*1
2t-2+2t-1
4t - 3

Edited to add:
You could use FOIL and then take the derivative of each term and get the same answer

QR: 1/(x-2)

denominator * derivative of numerator - numerator * derivative of denomintor/denomintor ^2
(x-2) * 0 - (1) (1)/(x-2)^2
-1/(x-2)^2


Easier way to do that one is to say

(x-2)^-1
-1(1)(x-2)^-2
-1/(x-2)^2

Hmmm...... One of us has a sign error...

Some day I will have the best staff in the world!!!

[mcneill79 0]

It is soooo you

Edited to add: We are using different equations to begin with. I didn't think the dash was part of the equation

[psipike02 0]

  Quote

IT F*****G SUX!

Anyone a Math Wiz and can help me out!? I'm past limits and finding derivatives. I am working on the product and quotient rules.

PR - (t-1)(2t-1)

QR - 1/(x-2)

I've got the answer from the back but don't know how to find them. Any help?

Yeah, thats the shitty part of calculus, i'm an engineer (or trying to be one) so i see that stuff every day. I liked Calc 3, man that was a great class. I know i'm a huge dork...

but if you do need help, feel free to PM me, i got to the thread late, so it looks like the answer has been found....

Puttin' some stank on it.

----Hellfish #707----

[Vertifly 0]

This stuff seemed a lot more interesting when (1) I knew there was a degree that would come out of it and (2) I didn't know that it was useless to anyone who was not going to become a Math Professor.

• Quote

[Everon 0]

Once you get past learning derivatives (and integration, for that matter) phase it becomes a lot funner with neat word problems and applications....

[skymedic 0]

Ummm...you just said calculus is "FUN"??? what up wit dat?

Wait a second I'm married to a math teacher....she talks about having fun doing math all day long.

amazing...you people are sick i tell you sick!!!

Marc
otherwise known as Mr.Fallinwoman....

[jasonRose 0]

  Quote

Once you get past learning derivatives (and integration, for that matter) phase it becomes a lot funner with neat word problems and applications....

Wait a minute... You never get past derivatives and integration.
Once you get past the basics you go on to partial differentials and double and triple integrals. Then when your brain is just about to explode they change the coordinate systems on you and make you do things in cylidrcal and spherical coordinate systems.

Whom ever came up with multivarible Calculus should be forced to drink mass amounts of beer. I am dam proud of my 2.00 in that class.

Some day I will have the best staff in the world!!!

[Everon 0]

Well, now you know. I've known for 20 years!

[Everon 0]

Love partials and multiple integration! Once it got to 3 dimensions though, I lost interest to the point where I despised it. Advanced calculus was one of the most boring math courses I ever had the displeasure of experiencing. Banal and vapid are two words that come to mind.

My favorite calculus topic was related-rates exercises. Couldn't get enough of it!!!

[genoyamamoto 0]

Remember this for future reference:

d/dx (UV) = dU/dx*V + UdV/dx

When you learn integration by parts, you will see that it is just a modified form of the above equation with all the elements integrated...

Integral(Udv) = UV - Integral(Vdu)

Gotta go... plaything needs to spank me
Feel the hate...
Photos here

[kallend 2,114]

  Quote

Love partials and multiple integration! Once it got to 3 dimensions though, I lost interest to the point where I despised it. Advanced calculus was one of the most boring math courses I ever had the displeasure of experiencing. Banal and vapid are two words that come to mind.

My favorite calculus topic was related-rates exercises. Couldn't get enough of it!!!

Isn't it a shame that the physical world around us is 3-dimensional?

...

The only sure way to survive a canopy collision is not to have one.

[jasonRose 0]

  Quote

Isn't it a shame that the physical world around us is 3-dimensional?

2-D would sure make the math better but would realy screw up skydiving...

Some day I will have the best staff in the world!!!