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Anyone know any Calculus?

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mrSHEiK124 said:
I got 1, -sin a. I just derived it until it simplified out...

What about 2?
Click to expand...

Really graph the first one, it will show what I said. (read how i answered it as well)


The other two i would just use Google to find a derivative solver, because of how long they would take.

They both use chain and product rule though.
 
Damnit, just took my exam and after I handed it in, I realized I forgot to do the 2nd part of a problem (finding the derivative at a point). I could have gotten ~5 points on that. Fuckstick.
 
TallBill said:
Alcohol and calculus don't mix. Never drink and derive.
Click to expand...

damn, came here to post this.

also, no offense OP, but freak occurrences like this is why i trained myself in the latter years of college to always finish my hw as soon as it was assigned. you end up doing the same amount of work, but no stress about finishing. of course some people work much better under stress i suppose.
 
Can't help yah there. I forgot everything. :/ If you asked me two years ago I could have kicked its ass. 😛
 
It was a couple of hours ago when I did that first problem, but if I recall correctly, it was -sin(a)
 
Matthiasa said:
Really graph the first one, it will show what I said. (read how i answered it as well)


The other two i would just use Google to find a derivative solver, because of how long they would take.

They both use chain and product rule though.
Click to expand...

Product rule not found & I disagree with infinity/-infinity for the first one.
 
DrPizza said:
I never experienced a curve in my math classes.
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I fucking hated college math courses. I remember taking a test and feeling good, getting it back and having like a 40 on it. I was just WTF? So I looked it over and there were like 3 problems that were worth like 60 points that I got correct, but I got marked for doing it the wrong way (did it how my high school calc teacher taught, not how they did it. I took it in, showed them that I didn't do it wrong, just different, the guy agreed but also said they wouldn't change the score. With the curve I ended up with like a 60-something. I was just like WTF. Sadly that wasn't even the most WTF test grading bullshit I experienced (which would interestingly enough include bigfoot and geology).
 
Because the first one is indeterminant(is that the right term?) you need to apply L'Hospital's rule (or however you spell that).

The other 2, just take the first derivative. Looks like you will at least need the chain rule, but the formatting in your post is so, ugh, that is all I am going to say.
 
darkswordsman17 said:
I fucking hated college math courses. I remember taking a test and feeling good, getting it back and having like a 40 on it. I was just WTF? So I looked it over and there were like 3 problems that were worth like 60 points that I got correct, but I got marked for doing it the wrong way (did it how my high school calc teacher taught, not how they did it. I took it in, showed them that I didn't do it wrong, just different, the guy agreed but also said they wouldn't change the score. With the curve I ended up with like a 60-something. I was just like WTF. Sadly that wasn't even the most WTF test grading bullshit I experienced (which would interestingly enough include bigfoot and geology).
Click to expand...

For some tests I have taken they specifically ask you to use methods learned in class. Or a problem tells you to use a specific method. On others, as long as you can prove and backup your answer, anything is fair game. If this wasn't the case for your test then that score is BS.
 
calculus.jpg


That's all I know
 
DrPizza said:
Product rule not found & I disagree with infinity/-infinity for the first one.
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As written it would have been 0 as fixed it's either + or - ∞.

You can graph it if you disagree. 😛

Er just checked yeah no chain rule. Horrible formating.
 
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Matthiasa said:
As written it would have been 0 as fixed it's either + or - ∞.

You can graph it if you disagree. 😛

Er just checked yeah no chain rule. Horrible formating.
Click to expand...

Could you explain why you think it's + or - ∞?
Here's a counter example of what I think you're using as a reason: what's the limit as x -> 0 of sin(x) / x ?
 
And, his formatting is perfect. Nothing wrong with it at all. Well, almost perfect. There's an unnecessary set of parentheses around the first term on #2.
Then again, I guess that assumes he copied the problem correctly.
 
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DrPizza said:
Could you explain why you think it's + or - ∞?
Here's a counter example of what I think you're using as a reason: what's the limit as x -> 0 of sin(x) / x ?
Click to expand...


thats 1, but he is dividing by x^2 for the fix.

Oh well I read it wrong either way whats one extra check when he was doing it. If you can you do if you can't well go on for it. 🙁
 
PieIsAwesome said:
For some tests I have taken they specifically ask you to use methods learned in class. Or a problem tells you to use a specific method. On others, as long as you can prove and backup your answer, anything is fair game. If this wasn't the case for your test then that score is BS.
Click to expand...

Yeah, no they didn't say anything specific. Just said show your work. After talking to them, they just said that's what the curve is for. I wasn't a fan of the grading (there were a bunch of cases of stuff even worse than mine, they always had people talking about the grading). I think at one point I got docked for showing the full work even (put in an extra unnecessary step that let me remember and think the problem through properly, and I lost like 2 points for it). I remember a quiz where 2 people in the class had the exact same answer and work, and one of them was marked wrong and the other correct, and the instructor wouldn't change the grade when they brought it up to him. It was fucked up.

The instructors were actually nice, but I got the impression that the people over them told them to never change grades so that they wouldn't get overwhelmed with people trying to get better grades. These were large classes (that were split into smaller but still 30-40 people recitations), so I could kinda see them doing that, but it would take a lot of complaints for them to do anything about their grading screwups.
 
TridenT said:
Can't help yah there. I forgot everything. :/ If you asked me two years ago I could have kicked its ass. 😛
Click to expand...

Yea, same here.

I still know the basics of deriving and integrating, but as soon as you throw some trig functions in there my mind goes blank.

Although, I'd probably figure it out if I tried, but I'm not interested in helping someone do their homework.
 
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