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**tony123****Member**- Registered: 2007-08-03
- Posts: 195

Express the following sum as a ratio of two integers:

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**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.

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