Question 1008207
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Solve {{{(1-(1/3))*(1-1/4)*(1-1/5)(1-1/n)}}}.
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<pre>
{{{(1-(1/3))*(1-1/4)*(1-1/5)*ellipsis*(1-1/n)}}} = 

{{{(2/3)*(3/4)(4/5)*ellipsis*((n-1)/n)}}} = 

{{{(2/cross(3))*(cross(3)/cross(4))(cross(4)/cross(5))*ellipsis*(cross(n-1)/n)}}} = {{{2/n}}}.
<pre>