Question

I am confuse.

Answer 1

\[f(x)=4x^{3}+2x^2+3x-1, find f ^{-1}(6)\]

Answer 2

Do you mean the first derivative of f(x)
\[\frac{ df(x) }{ dx }??\]

Answer 3

@Venomblast

Answer 4

@Venomblast

Answer 5

I took the derivative and I still and plugged in 6. I did not get the answer.

Answer 6

I am suppose to find \[f ^{-1}(-6)\]

Answer 7

first : derive
second : substitute with 6 in the derived function

Answer 8

need to do it together?

Answer 9

I did that.

Answer 10

so?

Answer 11

confused about what?

Answer 12

did not get the answer

Answer 13

what the answer you got?

Answer 14

411

Answer 15

not even close to my answer.

Answer 16

\[f'(x)=12x^2+4x+3\]
\[f'(6)=12*36+3*6+3=459\]

where can youfind the error?

Answer 17

i said -6 not 6. i corrected myself. and that is not even close to the answer.

Answer 18

ok
No problem.
\[f'(-6)=12*36-24+3=411\]

Answer 19

still wrong

Answer 20

so what is the right answer?

Answer 21

@Venomblast

Answer 22

You seem too sad, so that you don't respond!

Answer 23

i am. the answer is a much smaller digit.

Answer 24

Do you think that you are to find f inverse of 6?

Answer 25

I don't think so because Venomblast did not say "no" to me when I started talking about first derivative of f(x)

Answer 26

I know how to do it now. thanks for trying

Answer 27

I am happy to hear that.

Do not forget to medal who had helped you!