3 ms·
A cleaner derivation would be 1/(1-d) - 1/(1+d) = 2d/(1-d^2) followed by Taylor series, but the conclusion is obvious even without the Taylor series.
by random314 6y ago
A cleaner derivation would be
1/(1-d) - 1/(1+d)
= 2d/(1-d^2)
followed by Taylor series, but the conclusion is obvious even without the Taylor series.