# An electron moving along the x axis has a position given by x = 18 te-t m, where t is in seconds. How far is t?

An electron moving along the x axis has a position given by x = 18 te^-t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?

Do I have to find the derivative and solve for zero?

Do I have to find the derivative and solve for zero?

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