Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 Help Me ! » Summations » 2014-09-21 21:25:15

LittleBear
Replies: 1

Hi! I'm pretty stamped on what to do in a problem my teacher gave us.
See, the nth term is given, however, what the n is, is not.
For example:

1+2+4+8+...+65536

where a is 1
         d is  2
        last term is 65536

Now my problem is how do I get the n in

X(sub n) ?

I have the X, but I don't know the n. Help?

Board footer

Powered by FluxBB