Monday, September 24, 2007

Calculus Problem of the Day

Sine the Geometry Problems are so easily solved. I have a calculus problem to think about:
If 1 + 2 = 3 and
1 + 2 + 3 = 6 and
1 + 2 + 3 + 4 = 10, what is the sum of
1 + 2 + 3 + 4 + 5 +...+ n

Good Luck!
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1 comment:

Auralee said...

The formula for this kind of problem is:

(1+n)/2*n

or

.5n^2 + .5n

I'm going to have to work on the proof for this, though. I'll get that later.

September 25, 2007 at 7:16 AM

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