At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
Do you know what the derivative of a 2nd degree function is?
You know the following I guess: If f is decreasing, then f' is negative (and vice versa). If f is increasing, then f' is positive ( and vv).
No look at the first graph on the left. To the left of the y-axis, it is decreasing, to the right it is increasing.
yes it does
This means, for f' you are looking for a function that is negative on the left side of the y-axis and positive on the right.
so it will be #2 in the second attachment?
I can see it on one of your drawings on the right! Do you?
Yes it will be number 2 ?
so to will have letter A
No, I've got C
but you can't match a with c , it says to match the left with the right so it has to be a letter with a number
so number one will be 1 with letter c?
I meant number 2 sorry
so 2C ?
Now try #2. See what it does: increasing, decreasing, increasing. So you're looking for a graph that is +, then -, then +.
i thought we already did number 2
He was telling you number #1 is C. There musta been some confusion there c:
ohhh okay lol sorry
so number 2 will be f?
I think you got it!
number 3 looks funny
I think #2 is `e` actually :o hmm
It is down, up, down, up, so look for -,+,-,+
okay so number 3 will be A ?
@zepdrix : you're right, I'm having trouble looking at three different pictures, @onegirl: sorry ;)
okay thanks for the correction zep
so 3A ?
so number 4 will be D?
Right again! Always decreasing, so looking for a derivative that is always negative...
so i'm guessing number 5 will be 5B?
You guessed wrong... Look at graph #5 and compare with #3
It behaves in the same way: dec, inc, dec, inc, so -,+,-,+
ok so it will be 5f
Oops, look something went wrong with my last response. Because 5 and 3 behave in the same way, you have to choose the same derivative: 5A
so letter A goes to two graphs? okay
That's the mean part of the question ;)
okay so how about the last one number 6?
It goes down, then up, then down, so for f' we have: neg, pos, neg
so it will be 6B
No, that goes a lot more from - to + etc.
(it is really simple)
ohh so it will f since it does go negative pos then neg
Yes, it's 6F. I must admit this kind of question can be confusing, because you constantly have to switch from increasing , decreasing to +, -.
okay well thanks for your help