Please Help, hard math qestion!

Test Preparation
1

<p>I am confused about the Collegeboard Blue Book Test 8, sec. 8, question 15. Can someone explain the answer, please?</p>

2

<p>EastBay107, you are better off asking SAT specific questions in the SAT Preparations subforum.</p>

<p>Cancel n and n:
n/ [(n-1)(n+1)] = 5/k
or
n/ (n^2 - 1) = 5/k.</p>

<p>Make both numerators equal:
n=5
5/24 = 5/k
k= 24. Answer (C).</p>

3

<p>Could you post the original problem please?</p>