<p>anyone know why calculators are so expensive to begin with?</p>
<p>Ha we're almost never allowed to use calculators for our calc tests. Limits have to be done by hand and if there are graphs, we have to do them ourselves by finding the x/y-intercepts, critical points, horizontal tangents, and points of inflection. Fun stuff.</p>
<p>That sucks. We had the first quiz today. We got the calculator but he said that for a few of them we won't get to use it. </p>
<p>BTW....anyone have the Addison-Wesley book and a teacher that uses book tests and quizzes...I wanna see if I got one of them right on the first quiz and I don't remeber the problem, just that I got B as my answer. PM me if you have book quizzes</p>
<p>How did you get 1/4 for that? </p>
<p>lim x->0
((1/2+x)-1/2)/x</p>
<p>sub in 0 1/2 - 1/2 / 0 = 0/0 so we can use L' hopitals</p>
<p>derrivitive of top is 1, bottom is 1... so 1/1 =1</p>
<p>Second one
lim x-->0 (2+x)^3-8/x</p>
<p>again 8-8/0 = 0/0 so We can use L'hopitals
so limit = 3(2+x)^2/1 3(2)^2/1 = 12</p>
<p>I wrote it wrong...It's (1/(2+x)-(1/2)) / x</p>
<p>It's been discussed, you can read the other posts.</p>
<p>In my Calc AB class, we would have like 9 questions where we weren't able to use our calculator. We would then turn in that part of the test, and get a sheet with one more question where we were allowed to use a calculator.</p>
<p>In my Calc 2 class at a community college, calculators were only allowed for the final, not for the 4 other exams we had. You still had to show all your work on the final, though, to get full credit.</p>
<p>i love my teacher because hes the only teacher i have had that gives partial credit on multiple choice.</p>
<p>although i guess its fair because his lessons are questionable (he just puts the examples from the book that the book already explains on the board and doesn't explain them)</p>