- #1
Saladsamurai
- 3,020
- 7
Homework Statement
Prove that
[tex]\frac ab = \frac{ac}{bc}[/tex]
Homework Equations
Basic properties of numbers
The Attempt at a Solution
I really don't understand what is left to show here? By definition c/c means c*c-1 = 1. So is that is? That is:
[tex]
\begin{array}{l}
\frac ab &= \frac ab \cdot c\cdot c^{-1} \\
&= \frac ab \frac cc \\
&= \frac {ac}{bc}
\end{array}
[/tex]
I dunno. Is that it?