Indices law - Law 4

`a^0=1`   

How to remember `a^0=1`  

Anything to the power zero is `1`

It doesn't matter how many people there are there is only one sun.

One sun is one.

But why?

Try simple numbers you know first

We know `2/2=1` 

But so too `2^2/2^2=1`  

But this can be rewritten as  `2^2\times 2^-2`  

And rewritten again as `2^(2-2)=10^0`

So `2^0` must be `1`