# last question i swear..

by Precal_Chris
Tags: swear
 P: 40 yeah at my high school they only have precal, cal AB, cal BC and then stats and stuff but since i only have 2 more years of math left at highschool this year im taking precal junior year im taking ap stats and senior year im taking discrete math.. (easy math class but teaches you how to do real life stuff like balance check books and all that :/)
P: 1,345
 Quote by Precal_Chris oh...lol our teacher said there was a way easier way to do this but she wouldnt tell us...
The shorter way is essentially an application of something called the power rule:

If $$f(x) = x^n then f'(x) = nx^{n-1}$$

Wow, there are too many people trying to help :(
P: 1,635
 Quote by Precal_Chris wow and you guys knew how to do this all along... thats crazy how do you guys know all of that?
Well, you will learn this stuff, don't worry about that. I didn't know you were still in high school...lol....
 P: 266 Feldoh, using words in latex looks messy.
P: 1,635
 Quote by yourdadonapogostick Feldoh, using words in latex looks messy.

There is a way to write properly in LATEX, but i have no idea how, i also would be interested to know how to do it.
P: 1,635
 Quote by rocomath Maybe not but you usually act like a smart ***, but it's all good we still love you and we all do at one point in time :p
Yeah, probbably that's true what you are saying. I'll have to look upon that...lol..

Thanks for reminding me!!!That's what ( i do not know how to say this) friends are for.

P.S. This is not supposed to be a joke. I really meant this.
P: 266
 Quote by sutupidmath Well, with shortcut here i meant to use the other alternative of the deff. of the derivative, $$\lim_{x\rightarrow -1}\frac{f(x)-f(-1)}{x+1}$$ it takes you much faster to the answer.
I'd prefer not to resort to synthetic division.
P: 40
 Quote by yourdadonapogostick I'd prefer not to resort to synthetic division.
thats what i did at first...
and i got the -x^3+4x^2-5 to go into (x+1)(-x^2 +5x -5)/(x+1) and so the (x+1) canceled...
but when i told everyone that i got -x^2 +5x -5 for my answer they said that there was no x+1 in the numerator and i had to go through the other equation...
and i just realized if i would have plugged in the -1 for all the x's i would have gotten -11 baack in like post number 15 XD
P: 40
 Quote by sutupidmath Well, you will learn this stuff, don't worry about that. I didn't know you were still in high school...lol....
is this for like mostly college people or something?
P: 1,635
 Quote by Precal_Chris is this for like mostly college people or something?

Well, one usually learns this stuff in calc 1. So, i wrongly guessed...lol..
P: 266
 Quote by Precal_Chris is this for like mostly college people or something?
I learned calculus in high school and I never went to college. I did join the military as a Naval Nuclear Mechanic, though.
 P: 40 oh yeah she said this last six weeks we are going to be doing a lot of calc stuff

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