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CAS Example: Proof of the Midpoint-Tangent for a Cubic
Autore:
Michael Borcherds
Argomento:
Rette tangenti
A=(a,0) B=(B,0) C=(c,0) A cubic has roots a, b, c. The tangent at D (with x-coordinate (a+b)/2) will always pass through C. This is a proof, and an interactive demonstration.
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