math II question help

Test Preparation
1

<p>On meylani's second model test, #7 asks for the sum of the divisors of 60. He says the answer is 0 because if you add up both the positive and negative divisors, they cancel out and you get 0. I'm kind of suspicious of his answers after finding so many mistakes, so is it true that divisors can be negative as well as positive? I always thought they were positive whole numbers...</p>

<p>I looked it up in an algebra textbook, and it appears to list just the positive ones....anyone know for real? </p>

<p>And while I'm talking about it, how does everyone find the Math IIC an easy 800? I would consider myself decently good at math (5 in ap calc, yay) but I can never finish the test in time!</p>

2

<p>thats stupid. :) only the positive ones should be counted. :P divisors are implied to be positive.</p>

3

<p>Divisors can be negative or positive. If a number is only divisible by -1, 1, n, -n, then it is prime. If it is divisible by the previously mentioned factors and also additional factors, then it is composite.</p>

4

<p>ok...that was helpful, i guess :-)</p>

5

<p>anyone else...?</p>

6

<p>divisors can be negative or positive, but i think they're commonly referred to as positive. about the 800, it's mainly because of the curve.</p>

7

<p>Wow... the questions are getting more ambiguous all the time, aren't they?</p>

<p>:)</p>

8

<p>Generally, how many wrong = 800 on the math level II?</p>

9

<p>you have to get around 43 right</p>

10

<p>You have to get 43 raw score. So you could leave 7 blank and get none wrong, or leave 5 blank and get 2 wrong, etc.</p>

11

<p>Wow. And this curve is the same for all math 2c tests? Thats good because then I will not have to worry about rushing to get all 50 done.</p>

12

<p>does anyone know if the binomial theorem is on there? or the triangle thing where you have to do bsinA to see if two triangles, one triangle, or no triangles exist? Sorry if that last didn't make sense, I just really don't want to study those things if they're not going to be on there.</p>

13

<p>I believe both are on there.</p>

14

<p>What was that last one with bsinA?</p>

15

<p>Well if the length of two sides of a triangle and the angle opposite one of those sides is given, then you dont know whether you can have one triangle, two triangles or no triangles w/ that info. So you do bsinA which is the height and if side a is less than the height than no triangles can be formed. If side a is equal to the height, one triangle can be formed and if the height is greater than a which is greater than b, two triangles can be formed. I think we learned it in precalc.</p>