What is the equation for the sequence -5, 10, -15, 20, -25, 30..

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Jun 2, 2010, 03:24 PM

swood
find equation for sequence

What is the equation for the sequence -5, 10, -15, 20, -25, 30..

Jun 3, 2010, 03:26 AM

Unknown008

First, you can see that the term changes sign each time. This means that it is multiplied by a negative number each time.

Then, you see only multiples of 5...

This means that the pattern is as such:

5 x -1

5 x 2

5 x -3

5 x 4

5 x -5

5 x 6

When you multiply 5 by odd numbers, you add the negative sign, and when it's an even number, you put the positive sign. Post what you get for the next term :)

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