Last edited by mr fantastic; Jul 27th 2010 at 01:21 PM.
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Originally Posted by fxs12 Use Google to fnd the sum of cubes of formula. Now apply that formula.
Someway to prove the formula:
and solve the system of 4 equations, find A,B,C,D,E.
How about an inductive proof? . . . True. . . . . . . . . . . . . . . .
Therefore,  becomes: .
The inductive proof is complete.
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