Question

Let f(x)=9x^2
Enter the slope of the line tangent of f(x)at x=3

Answer 1

slope?

Answer 2

find f'(x)

Answer 3

No I have to find slope

Answer 4

yes i know find the derivative of f(x) it will give u the slope ...

Answer 5

oh gotch I am really confused with this problem so I have no idea where to start

Answer 6

i will show u how to do it

Answer 7

\[f(x)=9x^2 \longrightarrow f \prime (x)=18x\]

Answer 8

ok

Answer 9

now f'(3)=18x3

Answer 10

so one of the meanings of derivative is a slop

Answer 11

slope*

Answer 12

when u differentiate a function that means u found the slope of the tangent

Answer 13

keep that in ur mind at ur level

Answer 14

ok so then is the slope 18

Answer 15

now it says at 3

Answer 16

slope is 18x

Answer 17

y =mx recall

Answer 18

yes got that

Answer 19

So then I just have to say that my answer is 18x correct?

Answer 20

m=18 in general

Answer 21

but it is asking u the slope at x=3

Answer 22

18 times 3

Answer 23

oh so then what so I do

Answer 24

so then slope =54

Answer 25

yep

Answer 26

oh ok thanks

Answer 27

you're welcome!