<p>all parts of 3.</p>
<p>behappy, if you don't mind, can you explain little more?</p>
<p>dy/dx = 1 +y /x
ln|1 + y| = ln|x| + C
1 + y = C|x|
y = C|x| - 1
1 = C|-1| - 1
C = 2
y = 2|x| - 1</p>
<p>I dont know where you got the negative before the two but that is not my only point. The actual domain is from (-infinity,0)(0,infinity) Although the final equation has domain of all reals this produces an extraneous solution because if 0 is plugged into earlier equation there is a domain error because of ln|0|.</p>
<p>makes sense</p>
<p>Yeah...crap, I totally bombed that question...Just wondering though....Let's say for example that we got the equation wrong, I know we wouldn't get the point for the equation, but would we get the point for the domain if it is correct for our equation?</p>
<p>i doubt it if you have ever seen a grading rubric for AP free response questions you would see that they are very strict and have detailed explanations for what gets how many points.</p>
<p>Sorry! I have bad memory, but I am sure it's a linear equation and has absolute sign.</p>
<p>BTW, the grading rubric are very strict.</p>
<p>You could only get 3 at most if you got C wrong</p>
<p>the domain has to be the correct domain for the problem. If it is correct for a wrong equation, then it is wrong. Still 3/6 for a problem you did wrong isnt terrible.</p>
<p>So whats the equation of the line for x=108?</p>
<p>Hey guys, I have a question. I missed the absolute value sign, and the domain, for number 5b, but I believe I got pretty much everything else right on the free response. Given that I probably got a really low score on number 5 (3-4/9?), but all right on the rest of the free response (7-8-9/9), and did relatively well on the multiple choice, do you guys think I'm hitting the 5's? Thanks!</p>
<p>for question #6 </p>
<p>i got
a)
g'(0) = a - 4
g''(0)= A^2 + 4</p>
<p>h'(x)= Cos(kx)<em>f'(x)-k</em>sin(kx)*f(x)
b) y= 4x+10</p>
<p>g''(0) = a^2 +3, I believe.</p>
<p>****, your right i am hoping i just f'ed up in copying my answers.. cause that would be stupid mistake #2 on this section :(</p>
<p>And I got y=-4x+2 for the tangent line problem.</p>
<p>and #4 was</p>
<p>a) 11/20 ft/s
b) 2020 Ft
c) i made my first stupid mistake in taking this intergral so i got (27/2) + 2 instead of (27*2) +2</p>
<p>Is it ok if I thought h was y? Because I put h 2 = 4x.</p>
<p>**** i hope that omission of the - sign was another copy down mistake :(</p>
<p>and h is a function of x to give you y</p>
<p>h is not y</p>
<p>How did you figure out what g was when x=0? If x=0, then a would be canceled and g(x) = 3.</p>
<p>Darn! How many points would I lose if I put h instead of y, but had the equation right?</p>
<p>Here are the answers I had for the free response (well, what I remember of them anyway. I don't feel like doing them over again). Can anyone confirm them?</p>
<p>1.
a) 1.4xxx or 1.9xxx, don't remember
b) 10.xxx pi
c) pi * <a href="y+2">integral</a>^2-(e^y)^2, bounded by whatever those intersections are</p>
<p>2.
a) Straightforward
b) 12.xxx to 16.xxxx
c) Yes</p>
<p>4.
b) 2020
c) Rocket B</p>