Math Level 2 - January

Test Preparation SAT Subject Test Preparation
81

<p>if ur equation is right, its 2 lines... grrr this is bad</p>

82

<p>Yes, babeexphat, that sounds correct. The horizontal asymptote only models what f(x) becomes when x approaches either positive and negative infinity. Vertical asymptotes are absolute, however, because they are undefined at that x-coordinate.</p>

<p>The most interesting question I felt was</p>

<pre><code>ln x = e^-x
</code></pre>

<p>which I have yet to figure out how to solve without either graphing it or using the TI-89 solve function.</p>

83

<p>Tedjn: ur rite about sin 120. my mode was set in radians haha but i remember the theta was 120</p>

84

<p>whats the curve like om math lvl 2</p>

85

<p>When we discussed this, it was around a 45 for a 800.</p>

86

<p>for the ln one i did it on my ti-83...somehow without graphing...lemme think</p>

87

<p>I think that a raw score of 43 or 44 will get u an 800</p>

88

<p>That's right, you could have just plugged it in <em>looks sheepish</em> Can't believe I forgot about that!</p>

89

<p>Hey guys, for ln x = e^-x problem, you had to find where they intersected and then put the y term because they asked for what ln x equaled, so it was .269 or something</p>

90

<p>o wait i think i just plugged in the choices</p>

91

<p>Yes, I think I remember doing that. At least, I hope...</p>

92

<p>I had a ti-89</p>

<p>ln(x) = e^-x
x = 1.3098
ln (1.3098) = .26987</p>

93

<p>so are we still unsure about the trapezoid one? i remeber it asking for the area of a trapezoid which would be 7. something...</p>

94

<p>tapedDuck, it says how many lines can be drawn, the horiz. asymp. crosses points</p>

<p>I dont think they said "trapezoid"</p>

95

<p>they did say trapezoid! im like 100% positive.
No way would they ask a question thats not a trapezoid...</p>

<p>Anyways assuming the question asked for the are of the trapezoid, what did you guys get for the height?</p>

96

<p>so... 5 wrong = 45 - 1.25 = 44 - still a chance for 800
so a 40 will get like a 750??</p>

97

<p>It was around 2.43 something I think.</p>

98

<p>they said trapeaoid... im sure its 8.125</p>

<p>the ln one is .27</p>

99

<p>for 2 + 3i it is 2 - 3i because of the complex conjugate, it was a rule to memorize</p>

100

<p>kay good haha</p>