Question

How do you find the value of df^-1/dx at x = f(a)?
f(x) = 5x + 10, a = 4

Answer 1

first find f(a)

Answer 2

then just plug it in

Answer 3

f(a)=5a+10 and u know that a=4

Answer 4

so f(a)=30

Answer 5

Which means x=30

Answer 6

Is that \[\frac{ df ^{-1} }{ dx }\]?

Answer 7

Are there any parentheses around df?

Answer 8

so that means u can put the f in the denominator

Answer 9

and by the way wtf is f?
do u mean the inverse of f(x)?

Answer 10

not sure, I copied and pasted it straight off of the homework sheet, so I'm going out on a limb and assuming that it means inverse of f

Answer 11

not sure what just happened there, this thing just posted all of my previous posts over again

Answer 12

can u like screenshot ur hw sheet? it just says f^-1?

Answer 13

it says what you have posted up there\[df^-1/dx \]

it's number 10 and then also the same process for number 11

Answer 14

ya my computer cant read that right so find the inverse of f(x). You know how to do that? Just solve x=5y+10 for y and that will be f^-1(x)

Answer 15

then once u have that substitute it in the equation for f^-1(x) and we already found out that x=30

Answer 16

wait a minute wtf is d

Answer 17

what does the question say

Answer 18

find the value of df^-1/dx at x = f(a)
f(x) = 5x + 10, a = 4

Answer 19

BRB