Answer:
Step 6
Explanation:
From the given proof, consider Step 5 given below:
[tex]m_T=\frac{(b-a)-b}{c}[/tex]
By simplifying this step, we get the following results:
[tex]m_T=\frac{b-a-b}{c}=\frac{b-b-a}{c}=-\frac{a}{c}[/tex]
However, in the statement of Step 6, the result is given as a/c.
Thus, Step 6 of the proof contains an error.
