A little simplification problem

"Alasdair McAndrew" <[email protected]> Sat, 2 Aug 2008 00:18:21 +1000
Newsgroups gmane.comp.mathematics.axiom.user
Message-ID <[email protected]>
f(n)==7^n
f(n+1)-7*f(n)
simplify(%)

What do I need to do to enable the final statement to produce 0?

Thanks,
Alasdair

-- 
Blog: http://amca01.wordpress.com

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