Question

An electron moving along the x axis has a position given by x = 18te-4t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?

Answer 1

What is e in this?

Answer 2

Is this \(\large x=18te^{-4t}\)?

Answer 3

yes

Answer 4

i took the derivative and got

e^-4t(18-72t)

Answer 5

set it equal to zero and got 1/4

Answer 6

plugged it in and got 1.7 and it was wrong

Answer 7

change that i got

e^-4t(1-4t)

for the derivative