Question #47155

1 Answer
EZ as pi
Nov 3, 2016

n-1

Explanation:

{n-1-[n-1color(blue)(-(n-1))]}

={n-1-[n-1color(blue)(-n+1)]}

={n-1color(red)(-[n-1-n+1]}" "rarr {n-1-0}

={n-1color(red)(-n+1+n-1)}

={n-1}

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