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Hi, I am new and need help with a problem that a friend has set me, and I have no idea where to start with this.
The problem is
Prove n(Sum)1 x^3 = [n(Sum)1 x] ^2
if there is anyone here who can talk me through this or show me how its solved, id be very grateful to them.
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One way you can do it is by mathematical induction. Do you know what mathematical induction is?
Last edited by JaneFairfax (2009-01-09 11:49:09)
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Oh, come now.
You've clearly understood Morgana's question despite that speech, I would interpret it the same way you have and I can't think of any other sensible interpretation that this question could have.
Induction is probably the best way to go though.
Why did the vector cross the road?
It wanted to be normal.
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Another method is to consider
and use the standard formulas for
and .Last edited by JaneFairfax (2009-01-09 13:16:39)
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One way you can do it is by mathematical induction. Do you know what mathematical induction is?
I've always found this result rather surprising, and unfortunately induction isn't much of a 'why' method of proving things.
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