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

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**tony123****Member**- Registered: 2007-08-03
- Posts: 192

Express the following sum as a ratio of two integers:

Offline

**mathsyperson****Moderator**- Registered: 2005-06-22
- Posts: 4,900

Set x = 1997. Also ignore all the 4's for the moment. Then we have:

Put the factor of 4 back in, and you have 16/(x²-64).

Now replace the x with 1997, and you have 16/3987945.

Why did the vector cross the road?

It wanted to be normal.

Offline

Pages: **1**