The idea is the number of electrons is a whole number. So to find a charge that a “whole multiple” will satisfy all the charges on the drops.
Let X = the charge….A, B, C and D are whole.
Difference between BX and CX is . That’s the smallest difference.
So the charge of imaginary electron is
Can trigonometric substitution be used to solve this integral?
The integral in question is
I first completed the square in the denominator giving
It is at this point I used trigonometric substitution with
which is incorrect. The correct answer is
What went wrong with my trig substitution?
Express the limits as definite integrals.