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Sooner or later, all math leads to Calculus, no matter how much we would like to beleive that isn't true. Here's our Calc section... Brush up on your college math, pull out a your dusty textbook and get comfy.
Difficulty: 3 of 5 Latest: A Special Cubic Tangent Rating: 4.00
Let f(x) be a cubic polynomial with three real roots r1, r2, and r3. The roots can be in any order.
Let the average of r1 and r2 be z.
Now draw the tangent line to the cubic at point (z, f(z)).

Show that this tangent line will always pass through (r3, 0).
(No Solution Yet, 0 Comments) Submitted on 2021-12-24 by Brian Smith   
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