<p>Is Arithmetic Sequence and Series tested on the ACT? I'm reading Barron's 36 and I have never seen this stuff before. Should I bother to even remember it?</p>
<p>just memorize the basic series and sequence formulas.
also infinite geometric formula.
Barron is not a good study guide.
their questions are way more difficult than the real one.</p>
<p>is there a program for my calculator that could do it?</p>
<p>I don’t think TI comes with the built in program, unless you have TI89 or higher model.</p>
<p>Don’t memorize all of those- just understand where the formulas are derived from, especially the geometric series ones. Also, you can manipulate arithmetic series to something you already know how to find the sum of. And, yeah, you can easily program a TI-83/84 to do it for you.</p>
<p>Would go something like this:
ClrHome
Menu(“Series”,“Arithmetic”,A,“Geometric”,B,“Quit”,ZZ)
Lbl ZZ
Stop
Lbl A
Input “First term=”,F
Input “Nth term=”,N
Input “Common Difference=”,D
(F+(N-1)D)–>S
Disp “Sum=”,S
Pause
Return
ClrHome
Lbl B
Menu(“Geometric”,“Infinite”,H,“Finite”,I,“Return”,YY)
Lbl YY
Return
Lbl H
Input “First term=”,F
Input “Common ratio=”,R
(F/(1-R))–>G
Disp “Sum=”,G
Pause
Return
ClrHome
Lbl I
Input “First term=”,F
Input “Common ratio=”,R
Input “Nth term=”,N
(F(1-(R^(N))))/(1-R)–>G
Disp “Sum=”,G
Pause
Return</p>
<p>Yup, think that should work</p>
<p>I’ve never actually made a program on my calculator before but I get the main idea. I just can’t figure out how i plug in the words that are in “quotation marks” like “Series” “Arithmetic” and all those.</p>
<p>EDIT: I figured it out, I feel kinda stupid now. Thanks a ton for that, hopefully there will even be a question the test where I get to use it.</p>