(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Prove that

[tex]\frac ab = \frac{ac}{bc}[/tex]

2. Relevant equations

Basic properties of numbers

3. 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?

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# Homework Help: Spivak's Calculus: Chap 1: Problem 3i - Simple Proof

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