<p>(root t, t)? Yeah, half of a parabola. It's like y = x^2 except that x can't be negative.</p>
<p>The f(x)=f(-x) problem is really bothering me. Can someone please post choice E, since I am convinced choice B is correct (lewis).</p>
<p>Yeah that problem is bothering me as well.</p>
<p>I don't remember E, but I thought the question just asked for which equations are equivalent when f(x) = f(-x)? I do remember putting B.</p>
<p>Anyone remember the answer to the geometric series one?</p>
<p>I remember the series was something like:
(first term)<em>(3)</em>(1/3)^n</p>
<p>I think the other series question was:</p>
<p>an= a(n-1)+1/ an-2</p>
<p>You had to first find a(3) to find the answer, but I forgot both the given values and the answer...</p>
<p>was that one of the earlier problems?</p>
<p>and i remember there was a recursive problem given that a1 = something and b1 = something. I remember b3 = 9, but i don't remember the answer.</p>
<p>I think question on asymptotes was x=-2, x=3</p>
<p>and on a question on the absolute value inequality that made a square by intersection I answered something like
(1, root of 2/2)</p>
<p>yes dag i got both of those answers.</p>
<p>Anyone remember the answer to the question about the labor force for more than one hour, or something like that?</p>
<p>There was also one with a table that asked you what value of x fits for something like f(f(x))= #
but I forgot the answer.
It might have been either 3 or 2.</p>
<p>x =2</p>
<p>i don't remember anything about labor force</p>
<p>I also forgot the answer to the question on the triangle with theta= 40, a= 38, and the long side = 17.5.</p>
<p>Labor force, or price or something about work that took more than one hour. I think it was a simple plug in question.</p>
<p>we had to find the answer to the side opposite to 40 right?</p>
<p>then it was 13.11 if it was 38 then it was 5.213</p>
<p>ehh i don't remember that one.</p>
<p>obvious ones included...
1. First question of the test: 72 as the greatest common divisor (E)
2. Planes meet in a LINE and a POINT (i checked my textbook)
3. Someone started running in t hours then the other person started running in t+1 hours thingy...just plug in and you should have gotten (A)
4. Greatest value of 3cos + or x forgot..4sin thingy...i got 12, not 11.8...can anyone explain?
5. mean, median don't change question. i got (A). did anyone else get (A)?..anyways, i not sure if it is (A) or not, but the answer was the one that had values that were each on the right and left side of the mode. Only that way, the mode doesn't change.
6. Probability of choosing _ (was it integer or just 'number'?..forgot..this is important) from 7/8~4/3. I got 3/4 as the answer because if you put them into 21/24~32/24 form and then do 32/24 - 24/24 = 8/24, so it means 9 actually cos u need to do 8+1 to include both ends...and 32-21+1= 12. So 9/12 which was 3/4. Anyone object or concur? :)
7. (a+1)^a =1 or something like that...obviously watever base you have (whether it was (a+1) or not) if the exponent is 0, u get 1. So i put 0 for that one.</p>
<p>Poseur, i don't remember what you mean by "The last question, or some weird trig stuff I didn't look at: 2X^2 times the square root of (X^4-1)." any more details or answers?</p>
<p>It is 11.8 because it is cos FIVE x, not just cosx (and sin is sinx), therefore the perceived maximum value is actually restricted.</p>
<p>For labor force thing,</p>
<p>I believe final was 115 because of the greater integer function.</p>
<p>The last question said.</p>
<p>sin(a)=x^2
Then what is sin(2a)</p>
<p>Well from the trig identities you get:
sin(2a)= 2sin(a)cos(a)</p>
<p>If sin(a)= x^2, then you can construct a right triangle where the hypotenuse is 1 and one of the legs is x^2.
According to the Pythagorean Theorem, the other leg has to be (1-x^4)^(1/2), which makes that equal to cos(a).
Therefore the answer was 2x^2(1-x^4)^(1/2)</p>