hey does anyone know how to solve this?
Prove 1x2+2x3+3x4+...+n(n+1)=1/3n(n+1)(n+2) for each n of the element of natural numbers. x = multiplication
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You're asked the sum :
Do you know the general formulae for these sums ? You should have learnt it...i think ^^
Hello, TheMikego! Prove: . How about an inductive proof?
We have: .
Add to both sides: . .
The right side is: . . .
We have established . . . The inductive proof is complete.
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