Proof: Marginal Cost Equals Average Cost at Minimum of AC

A mathematical proof that MC = AC at the minimum AC.
Proof: Marginal Cost Equals Average Cost at Minimum of AC
Proof: Marginal Cost Equals Average Cost at Minimum of AC
Proof: Marginal Cost Equals Average Cost at Minimum of AC

prove that mc = AC at minimum point of AC,show that MC equals average total cost at minimum,