Computer Math: Prove using induction that 1*2 + 2*3 + ... + n*(n+1) = n*(n+1)*(n+2)/3

[jar_mac]

The question is:
"Prove using induction that
1*2 + 2*3 + ... + n * (n+1) = n * (n+1) * (n+2)/3"

Help please

Thanks,

Jared

 

[tkhunny]

Well, do it.

1) Show that it starts.
2) Show that one implies the next.

Go!

 

[mmm4444bot]

Help please

What kind of help would you like?

For example, would links to on-line lessons about induction help?

If you've already tried to begin this exercise, then please show us your steps and explain why you're stuck.

Check out the forum guidelines, too. Thanks! :cool:

 

[stapel]

Prove using induction that

. . . . .1*2 + 2*3 + ... + n * (n+1) = n * (n+1) * (n+2)/3

Help please

"Help" with what? They gave you the plug-n-chug process (like here). You started by plugging "1" in. And... then what?

Please be complete. Thank you!