<p>Geometric Sequence Formula, Some of Finite Geo Series, Some of Infinite geo series, some of finite arith series </p>
<p>If you guys have these formulas please post em', I got math2c tommorow and I dont have my precalc textbook since school is over thanks.</p>
<p>Also:
Can someone explain Contrapositive,Converse, and Inverse in Logic with short examples.</p>
<p>geometric sequence: tsubn = tsub1(r^(n-1))
arithmetic sequence: tsubn = tsub1 + d(n-1)
arithmetic sum: Ssubn = (n/2)(tsub1 + tsubn)
geometric sum: Ssubn = tsub1(1-r^n) all over 1-r
geometric infinite sum: Ssubn = tsub1/ 1-r</p>
<p>for if p then q contrapositive is if not p then not q and it's not always the same as the first</p>
<p>i'm not too sure about inverse and converse, but i think one is if p then not q and the other one is if not q then p</p>
<p>Contrapositive for p-->q is ~q-->~p
Equivalent to the original statement.</p>
<p>Inverse and converse are equivalent:</p>
<p>~p-->~q
q-->p</p>
<p>If these are true, you have an iff statement.</p>
<p>Elaborate still dont get what that means =p.</p>