Question

The position pf a particle moving along the x-axis is given by x = (21 + 22t - 6t^2)m, where t is in seconds. What is the average velocity during the time interval t = 1 s to t = 3 s

Answer 1

i know \[f' (t) = 22 - 12t\]

Answer 2

so do i do \[22 - 12(3) - [22 - 12(1)]\]

Answer 3

oh wait...i know what i did wrong...hold on

Answer 4

i do \[22 - 12(3-1)\]
right?

Answer 5

-2?

Answer 6

yup. it's -2.

Answer 7

thanks for watching @curiousshubham

Answer 8

but seriously...is my solution right?

Answer 9

hey sorry i was outside........ let me check...

Answer 10

my solution is \[22 - 12(3-1)\]
\[\implies - 2\]

Answer 11

\[f(t) = 21 + 22t - 6t^2\]
\[\implies f'(t) = 22 - 12t\]
\[\implies 22 - 12(3-1)\]
\[\implies - 2\]

Answer 12

hey its right.. but wait em still confused but don't know why...

Answer 13

yeah right....

Answer 14

yeah right it's right?

Answer 15

i'll take that as a yes