Tricky maths

Tridymite | 19:01 Mon 30th Apr 2012 | Science

3 Answers

Can anyone help with this?

Show that the sum between 1 and k of k.3^(3-1) =1/4[(3^k).(2k-1)+1].

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dr b

can you clarify? what is k.3^(3-1) supposed to represent? 3^(3-1) is just 9.

Prudie

Agreed or it could be 3k^2 (3k squared)

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