<p>Hi</p>
<p>I thinks this thread should be useful to anyone that about to take the SAT I or maybe even SAT II. I'm very new to the SAT so I was wondering if anyone who drop by could post a formula or two that you find helpful on the SAT.</p>
<p>Thanks!</p>
<p>a(t) = a0(n-1)d</p>
<p>The arithmetic sequence formula.</p>
<p>^^ Care to explain that one?</p>
<p>a = first term of series, n = the term of the series you are trying to find, and d is common difference of series. Its a bit wrong though, probably typo, U(n)= a + (n-1) d.</p>
<p>Oh, yeah. I forgot to put the “+” in. Sorry about that!</p>
<p>a^2 + b^2 = c^2
oddly seems to come up a bunch</p>
<p>^^</p>
<p>maybe the most important SAT I math formula</p>