Question

PLEASE HELP!! piccture included

Answer 1

It helps to plot some points first

Answer 2

have you learned how to take derivatives yet?

Answer 3

Plot x=1, 2, 3, 4, and 5

Answer 4

I have learned a bit about derivatives yes @Vocaloid

Answer 5

I'm assuming he doesn't need to do derivatives here since all the answer choices are whole numbers, but that's the best way to do it

Answer 6

do you mean t=1,2,3,4? @nuttyliaczar

Answer 7

Yeah that's what I meant

Answer 8

At which numbers is the particle moving right?

Answer 9

if by right you mean becoming positive then from t=4 to t=5

Answer 10

because at t=4 the answer is -27 and at t=5 the answer is 0

Answer 11

But if you want to do it using derivatives, find the derivative and set it equal to 0. And you are right there but not for the right reason

Answer 12

what is the correct reason?

Answer 13

Make sure you realize that from 4 up it starts moving to the right. Just because the answer is positive is not the only reason

Answer 14

Maybe you understood that but I just want to clarify

Answer 15

ah i understand, thank you for the calification, so the answer would be t>4

Answer 16

Yep, because if you notice the pattern, the number will only get bigger from then on

Answer 17

thank you, it was a lot easier to plug in then to find the derivative

Answer 18

Yeah chain rule with product rule is longer than this

Answer 19

thank you