Math IIC help for my desperate daughter

Test Preparation SAT Subject Test Preparation
1

<p>She's studying for Math IIC for Saturday and did the practice test in the College Board Real SAT II: Subject Tests book. She's now made at me since the book doesn't give the explanation for the problems. Does anyone have a link to someplace where this test has been discussed? If not, has anyone worked through these? If so, I can post the ones she's having trouble with and see if anyone can give her an explanation.</p>

<p>This is frustrating for her since she's finishing honors pre-cal with an almost perfect average and still having trouble with some of these problems.</p>

<p>Thanks</p>

2

<p>im taking the math IIC saturday too...i am in the same situation (hon.precalc, A avg) and definitely a few questions are impossible for me each time. even if you absolutely have no idea on a question, or a type of question, you can still get a 780-800, and that includes other mistakes. she should be fine.
i think your best bet would be to move on, do another practice test or two. i would be happy to see some of the questions...so would others i think, so post if you like. if not, maybe have her ask a math teacher tomorrow.</p>

3

<p>Here are 2 she asked me to post since she doesn't even know how to approach them</p>

<ol>
<li> If Xo = 0 and Xn+1 = the square root of 6+Xn, then X3 =
[note -- after the first X, the o; after the second X, the n+1; after the third X, the n; and after the last X, the 3 are all in subscript -- couldn't get the computer to let me type it that way)</li>
</ol>

<p>(A) 2.449
(B) 2.907
(C) 2.984
(D) 2.997
(E) 3.162</p>

<ol>
<li> If (6.32) to the M power = (3.02) to the n power, what is the value of m/n?</li>
</ol>

<p>(A) -0.32
(B) 0.32
(C) 0.48
(D) 0.60
(E) 1.67</p>

4

<p>I have no idea what 34 is asking because of the way you typed it out.</p>

<p>for 38:</p>

<p>6.32^m = 3.02^n</p>

<p>take the log of each side:</p>

<p>log (6.32^m) = log (3.02^n)</p>

<p>based on log rules, whenever you take the log of something that is raised to a power, you take the power and multiply it by the log. for example: log (a^b) = b x log (a)</p>

<p>m x log (6.32) = n x log (3.02)</p>

<p>find out the values of the logs using the calculator.</p>

<p>m x .8001 = n x .48</p>

<p>m = n x .5999</p>

<p>m/n = .5999 = .6 (D)</p>

5

<p>37.
Recursive sequence.
Two choices
1) Define the sequence explicitly
2) "Recursive" your way up to the desired value.</p>

<p>For the sake of simplicity and the convenience of the numbers we'll choose option 2.</p>

<p>X<em>{0+1}=\sqrt{6+0}
X</em>{1+1}=\sqrt{6+\sqrt{6}}
X<em>{2+1}=\sqrt{6+\sqrt{6+\sqrt{6}}}
X</em>{3} \approx 2.984
**C<a href="unless%20I%20messed%20up">/b</a>.</p>

<p>38.
6.32^m=3.02^n
\frac{m}{n}=\frac{\log{3.02}}{\log{6.32}}
\frac{m}{n} approximately equals **D<a href=".6">/b</a></p>

6

<p>Both right -- thanks tons.</p>

<p>Now that she knows of the existence of this website, I'm sure she'll be joining in. I've been keeping it from him for fear that she'll spend too much time here.</p>

7

<p>I did 38 by sbustituting a number in there. Like figuring out 6.31^2, and then figuring out the n so 3.02^n = 6.31 ^ 2, and then 2/n. Not as technical as the above posts but easy to understand.</p>