# Math teachers, can you help me out with this calculus question?

Discussion in 'Secondary Education' started by Peachyness, Dec 15, 2009.

1. ### mmswmModerator

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Dec 16, 2009

Remember, we want people to LIKE math. Overwhelming people usually isn't the best way to do that :lol:

2. ### TeacherGroupieModerator

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(agreeably)

One can do worse, mm, than to paraphrase E.B. White's remark on William Strunk's goal in writing The Elements of Style:

"Will felt that the reader/math student was in serious trouble most of the time, floundering in a swamp, and that it was the duty of anyone attempting to write English/teach math to drain this swamp quickly and get the reader/student up on dry ground or at least to throw a rope.”

3. ### HMMCohort

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Dec 16, 2009

But that is the kind of stuff that made me like math

4. ### mmswmModerator

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Yeah, it was linear algebra that did it for me, but, most people would consider too much information frightening.

5. ### MuttlingDevotee

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Dec 16, 2009

Bob the farmer has a 20 by 50 field. What is the area of his field?

Simple........f(x) = 20 and then integrate f(y) = 20dY from 0 to 50.

6. ### HMMCohort

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Dec 16, 2009

$\int_0^{20}\int_0^{50}{1}dydx$

7. ### CindyBlueCohort

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Dec 16, 2009

OK, since no one has posted an answer yet... (grrr!)
Is it ((2(x+3)^(5/2))/5)-(x+3)^(3/2) ???
Help me, I'm rusty!

8. ### mmswmModerator

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Dec 16, 2009

Almost, but not quite. The last term should be -((x+3)^(3/2))/2

9. ### HMMCohort

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Dec 16, 2009

I think it should be $-2(x+3)^{3/2}$

also don't forget your arbitrary constant

10. ### mmswmModerator

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You're right. I haven't been to sleep since 5pm yesterday (it's 7pm now). Serves me right to try to do mental math, while watching mythbusters with my boys and eating chocolate chip cookie dough and surfing the net...all at the same time. Particularly when I'm this tired.

11. ### HMMCohort

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$\frac{2}{5}(x+3)^{5/2}-2(x+3)^{3/2}+c$

12. ### mmswmModerator

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Dec 16, 2009

I need to bookmark that link.

13. ### HMMCohort

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Dec 16, 2009

yes...it is very nice!

14. ### mmswmModerator

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Drat. It's not a link. It's code. Is there a site that provides the code where one could cut and paste?

15. ### HMMCohort

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Dec 16, 2009

here is a pdf with a lot of $\LaTeX$ commands

16. ### TeacherGroupieModerator

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Dec 16, 2009

Which presupposes that one has LaTEX on one's computer, yes?

17. ### HMMCohort

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Dec 16, 2009

No

Just type in the LaTeX command after

Code:
http://latex.codecogs.com/gif.latex?
Just like

Code:
http://latex.codecogs.com/gif.latex?\int{x}dx
then display as an image...

$\int{x}dx$

18. ### TeacherGroupieModerator

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What, like in a regular ol' browser window??

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Dec 16, 2009

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