<p>Here is a math question I need help with:</p>
<p>If (n)/(n-1) * (1/n) * (n/n+1) = (5/k) for positive integers n and k, what is the value of k?
a. 1
b. 5
c. 24
d. 25
e. 26</p>
<p>C. 10 Char</p>
<p>n=5 so plug 5 into the equation and u get K=24.</p>
<p>I think this works, but when i did the problem i first simplifed and got,
n/(n^2-1)=5/k. since n is on top, it is equivalent to the 5 on top of k. then just plug and get 25-1 = k for the bottom portion. not sure if this works but it gets the right answer.</p>
<p>I know what he did... I think at least.. i kept on thinking on this problem that (n-1)(n+1) = (n-1) squared... for some reason. But I finally understood after a minute or 2.</p>