Help with indices question

I need help with this maths question. Someone please give me answer and explain how to get it thanks.

https://gyazo.com/01b6bf8f854c98971e229591ff10d292

Original post by SpinnerPvP

I need help with this maths question. Someone please give me answer and explain how to get it thanks.

https://gyazo.com/01b6bf8f854c98971e229591ff10d292

Any number to the power of 0 is equal to 1 e.g.

8^0 = 1

.

Any number to the power of -1 is the reciprocal of that number e.g.

8^{-1} = \frac{1}{8}

anything to a power of 0 equals 1 because you can write

a^n \times a^{-n}=a^{n-n}=a^0.

Also

a^n \times a^{-n}=a^n \times \frac{1}{a^n}=\frac{a^n}{a^n}=1

How does one get the 'divide' symbol in tex? I tried /div

How does one get the 'divide' symbol in tex? I tried /div

It is \div:

\div

- make sure to use the \ and not /.

Original post by SpinnerPvP

I need help with this maths question. Someone please give me answer and explain how to get it thanks.

https://gyazo.com/01b6bf8f854c98971e229591ff10d292