<p>I’m tired of people saying that the x^2<4 problem was impossible. If you look at the wording, it asks which interval INCLUDES all values that satisfy the inequality. It didn’t say that it had to be ONLY those numbers that satisfy the inequality. Hence, the answer was [-3,3]</p>
<p>@fledgling
780-790 on most tests.</p>
<p>@BMittman
Exactly my sentiments. :)</p>
<p>I was confused with sqrt(-x^2) problem. I think it asked for domain of real numbers?</p>
<p>Was the answer “only 0”? I guess it was, but at the time, for some stupid reason, I thought it wasn’t possible to square 0, make it negative, and take sqrt of the answer. oh ****.</p>
<p>Bilguun, that’s the only question I know I got wrong for sure, I put empty set, too.</p>
<p>With an added buffer zone of 2 missed questions for unknown/stupid mistakes, I’m at 2 omit, 3 missed maximum. Hopefully the curve isn’t too small…</p>
<p>Two Questions:</p>
<p>First, what is the answer to the question about how many lines intersect in an (x,y,z) plane? And please explain your reasoning.</p>
<p>Second, the for function 4x^3 - 3x^2 +1 (something resembling that) question, what was the answer. And does anyone remember the function exactly?</p>
<p>Thanks</p>
<p>@Bilguun, I took the October test too and found it to be much more difficult. I’m hoping for at least another 50 points above that score from today’s test.</p>
<p>I also got the “only 0” question wrong… so far 5 omitted and -1 then… I guess I’m just gonna hope for the best.</p>
<p>Two Questions:</p>
<p>First, what is the answer to the question about how many lines intersect in an (x,y,z) plane? And please explain your reasoning.</p>
<p>Second, the for function 4x^3 - 3x^2 +1 (something resembling that) question, what was the answer. And does anyone remember the function exactly?</p>
<p>Thanks</p>
<p>^ i think for the second part it was asking how many non-real roots that had. i put two. I could be so off though</p>
<p>I put 2 as well.</p>
<p>-5 ■■■■ there goes my 800 :'(</p>
<p>It’s two.
I just found that the equation got saved on my calc when I entered it in the polynomial solver.
It was: 4x^3-3x^2–1</p>
<p>please correct me if I am wrong but for the question that asks the expression of f(x) when f(3x-2)=x, aint the answer (x+2)/3? My reason is that since (3x-2+2)/3=x, f(x)=(x+2)/3</p>
<p>Quoted “Question that had the table of frequencies and had the frequency of 4 equal x — that should have been “x = 4””
Does anyone remember if the question says the mean of the “frequencies” or the mean of the “data values”?</p>
<p>@duncanLV
Hasn’t this question been addressed before? You’re correct.</p>
<p>did anyone get an answer of (8,-8)? i don remember the question…nd i know this is a really stupid one but for NUMBER 1 was it 72?? i blanked out on tht 1 haha…wht a fail…
nd did we have to find the frequency or period fr tht sine graph</p>
<p>I know it has been mentioned that 72 is the correct answer for the greatest common divisor is but I got 24. Did anybody else get that? I think the numbers were 72, 144, and 312 so in that case 24 would be right.</p>
<p>@adrielklein
The third number was 216 and the answer was definitely 72.</p>
<p>@800pls
Yes, it was (-8,8).
For the other question, I think, we had to find the frequency, which was the reciprocal of the period.</p>
<p>I omitted 5 because I didn’t have time to go back to the questions I left and planned to do later. Other than that 2 wrong (Infinitely many one and the x^2>4 one) so far and hopefully it’ll stay that way. If I get another wrong, I’m screwed since the negative mark would also come into effect. I wanted an 800 and I got a confidence boost as well when I got an 800 on the official practice test. I thought the practice test was easier.</p>
<p>Everybody should email the collegeboard and complain about the x^2 < 4 question. For once we have an opportunity to improve our grades after the tests were handed in! Cease this chance, make a difference, and complain today!</p>
<p>Take 800 or bust’s idea, but don’t “cease” this chance, that would be counterproductive. SEIZE it instead!!!</p>