okay so I'm failing calc if I can't finish these two more problems tonight then I'm kicked out of the clas, so please help someone ;-;
I'm jsut going to post the first one, if someone can hep me with that I'll post the second. For some reason I suck at these problems even though they seem easy. :(
(http://i19.photobucket.com/albums/b186/Pinkanglgirl/calchelp.jpg)
The figure above shows the graph of f', the derivative of f.
The domain of f is the set of all real numbers such that -3 < x < 5
a) For what values of x does f have a relative maximum? why?
b) for wgar values of x does f have a relative minimum? why?
c) On what intervals is the graph of f concave upward? Use f' to justify your answer.
d) Suppose that f(1) = 0. In the xy-plane provided, draw a sketch that shows the general shape of the function f on the open interval 0 < x < 2.
Look for critical numbers first.
Quote from: Ethereal on February 09, 2009, 07:48:02 PM
Look for critical numbers first.
I can get that far, it's just that I can never remember which equation to plug into to find the positives and negatives for ifferent things, and then waht the different positives and negatives mean for it and ARGH.
a)x = 4 because the slope changes from positive to negative at that point.
b)x = -2 " " negative to positive at that point
That's weird, we just went over this today in class.
I can help you with c. Okay, this is the graph of f'. What is the derivative of f'?
(http://i98.photobucket.com/albums/l263/Zyphet/Untitled-1-22.jpg)
Quote from: Lozal's Other Best Friend on February 09, 2009, 08:49:26 PM
(http://i98.photobucket.com/albums/l263/Zyphet/Untitled-1-22.jpg)
she was supposed to do it on her own :|||||||||
Quote from: Ethereal on February 09, 2009, 08:50:55 PM
she was supposed to do it on her own :|||||||||
Fuck that, Im not gonna sit around for an eternity trying to explain it. n_u
Why the fuck would anyone who's not a masochist ever take calculus? akudood;
Quote from: Slim on February 09, 2009, 08:57:41 PM
Why the fuck would anyone who's not a masochist ever take calculus?
Credits. :(
Quote from: Slim on February 09, 2009, 08:57:41 PM
Why the fuck would anyone who's not a masochist ever take calculus? akudood;
It's actually easier than statistics. Don't ask me how that works. akudood;
Quote from: Slim on February 09, 2009, 08:57:41 PM
Why the fuck would anyone who's not a masochist ever take calculus? akudood;
Required for my major. sillydood;
The only reason I passed pre-cal was because I copied my friends' papers during the tests. Same goes for Algebra 2. good times.
akudood;
Quote from: Slim on February 09, 2009, 08:57:41 PM
Why the fuck would anyone who's not a masochist ever take calculus? akudood;
If you ever want to do something useful, you'll need it.
Quote from: Pancake Persona on February 09, 2009, 09:13:18 PM
If you ever want to do something useful, you'll need it.
Advanced math is not useful unless you plan on being an engineer or something.
Quote from: Slim on February 09, 2009, 09:18:13 PM
Advanced math is not useful unless you plan on being an engineer or something.
that's why i said if you ever want to do something useful, you'll need it
a) For what values of x does f have a relative maximum? why?
when x = 1 because it's the highest point before y approaches infinity
b) For what values of x does f have a relative minimum? why?
when x = -1 and x = 3 because it's the lowest point before y approaches infinity
c) On what intervals is the graph of f concave upward? Use f' to justify your answer.
between x = -1 to x = 3 because the slope of the tangent line at x = 1 is zero and the points surrounding decrease to zero and then increase from zero.
d) Suppose that f(1) = 0. In the xy-plane provided, draw a sketch that shows the general shape of the function f on the open interval 0 < x < 2.
too much thinking.
Quote from: Lozal's Other Best Friend on February 09, 2009, 08:49:26 PM
(http://i98.photobucket.com/albums/l263/Zyphet/Untitled-1-22.jpg)
woah, that's actually what I got.
i ended up getting that one right, but got the next one (that I didn't post) was ridiculously incorrect.
I'm going to scan and post it now.
Quote from: Raekewn on February 09, 2009, 08:30:06 PM
a)x = 4 because the slope changes from positive to negative at that point.
b)x = -2 " " negative to positive at that point
Quote from: reefer on February 10, 2009, 12:43:55 AM
a) For what values of x does f have a relative maximum? why?
when x = 1 because it's the highest point before y approaches infinity
b) For what values of x does f have a relative minimum? why?
when x = -1 and x = 3 because it's the lowest point before y approaches infinity
c) On what intervals is the graph of f concave upward? Use f' to justify your answer.
between x = -1 to x = 3 because the slope of the tangent line at x = 1 is zero and the points surrounding decrease to zero and then increase from zero.
d) Suppose that f(1) = 0. In the xy-plane provided, draw a sketch that shows the general shape of the function f on the open interval 0 < x < 2.
too much thinking.
oh shit, contradicting answers ;-;
I'm inclined to listen to jimvers because creeper has given me incorrect answers in the past. baddood;
Quote from: Sam on February 10, 2009, 11:51:21 AM
oh shit, contradicting answers ;-;
I'm inclined to listen to jimvers because creeper has given me incorrect answers in the past. baddood;
im right. think about it.
if you have a curve like
/'\
/ is positive slope ' is the maximum then \ is negative slope.
JMV is correct, sam.
Good because I agreed with JMV when I thought it through yesterday. I'm fairly certain I got everything right on that page.