Mammoth Memory

Indices law - law 2

 `a^-n=1/a^n`

 A negative is divide

To remember this put simple numbers in. ie Try simple numbers you know first.

`10^-2=1/10^2=1/(10times10)=1/100=0.001`

`8^-1=1/8=0.125`

`8^-2=1/8^2=1/(8times8)=1/64=0.0156`

 

Also try other examples you know like starting with `10^2` and remove `1` from the power and understand the answer you get:

Remove 1 from the power and the answer gets smaller and smaller

Examples

1.       `5^-3`  is the same as  `1/5^3`

2.       `x^-3`  is the same as  `1/x^3`

 

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