Power (1 Viewer)

[joel_x10]

Did this last year but I cant remember

eg.

3^x=19683

How can you work out the power without just trying every number till one fits?

 

[onebytwo]

use log laws, by taking log of both sides, then bring the index, x, down.

 

[joel_x10]

Ah yes, I remember now, thanks