Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

Stormtangent
2013-03-09 14:23:30

Hi,

If you subtract consecutive terms, you see that you get:


Subtracting again, you get


You could find the quadratic.  However, another way is to realize that
, which, after solving, gives

bobbym
2013-03-09 12:16:56

Hi;

You can use differences to get the answer

infinitebrain
2013-03-09 11:55:17

Given the sequence


find k
I found the answer as 291, through a tedious guess and check method, but I'd like someone to explain in simpler terms how to find k.

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