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  1. ElectronicTeaCup

    I Product of distances from foci to any tangent of an ellipse

    Thank you for your reply. I notice now that not only did I write the equation incorrectly, (wrote ##b^{4} x_{0}## instead of ##b^{4} x^2_{0}##) I incorrectly substituted ##c^2## for ##c## o_O Thank you for your advice, I have this misconception that algebra is unimportant in the computer age...
  2. ElectronicTeaCup

    I Product of distances from foci to any tangent of an ellipse

    As part of the final stage of a problem, there is some algebraic manipulation to be done (from the solution manual): But I'm getting lost somewhere: Also a bit of general advice needed: This is part of a self-study Calculus course, and I often have difficulty with bigger algebraic...
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