Question

Given F(x) shown below, complete the equation for the inverse of F(x). If necessary, use the slash mark (/) for the division symbol.

Answer 1

\[F(x)=\frac{ 2x }{ 7+4 }\]

Answer 2

\[f ^{-1}(y)=\]

Answer 3

@Luigi0210 @Anickyan i really lost on this problem

Answer 4

Oh, fun one :)

Answer 5

\(y = \frac{2x}{7 + 4}\)
solve for \(x\)

Answer 6

x+2/11?

Answer 7

Nope.

\(2x\) means \(2 * x\)

Answer 8

so 2+x/11

Answer 9

is the^ right

Answer 10

No. Do you want me to keep on explaining or give you the answer?

Answer 11

@Anickyan

Answer 12

what very u think is best for me

Answer 13

I think explaining it the best thing. I can give you some easy tasks to do: http://www.sosmath.com/algebra/solve/solve0/solve0.html

They start easy, and get more and more difficult.

Answer 14

damn thats really hard

Answer 15

hey can u help

Answer 16

@Anickyan @Luigi0210

Answer 17

@Anickyan Already explained it..

Answer 18

i keep on getting 2+x/11

Answer 19

i give up its hard

Answer 20

@mathstudent55 can u check mt answer

Answer 21

You have \(F(x)=\dfrac{ 2x }{ 7+4 }\) which is really just \(F(x)=\dfrac{ 2x }{ 11 }\)

Replace the F(x) with y:

\(y=\dfrac{ 2x }{ 11 }\)

Now solve it for x.

Answer 22

You should NOT get getting \(y=2+\dfrac{ x }{ 11 }\)

In fact, you should be getting x={some stuff involving y|

Answer 23

The inverse of f(x) should be written as
\[f ^{-1} (x)\]

Answer 24

So the question is stated incorrectly.

Answer 25

@kropot72 , I agree but we had a big thread about this yesterday, lol. @romanortiz65 's instructor apparently uses different notation.

Answer 26

x-2/11?

Answer 27

@kropot72 this will explain it: http://openstudy.com/study#/updates/521b8fdbe4b06211a67d369e

Answer 28

@romanortiz65 you have

\(y=\dfrac{ 2x }{ 11 }\)

And you need to solve for x. what is STEP 1. Tell the first thing you will do.

Answer 29

switch y and x

Answer 30

That isn't how you "solve for x". You solve for x by isolating x, getting it all alone.

Answer 31

oh x+2/11

Answer 32

Again, you should have x ALONE. and it should be = something. I'm not sure why you are giving responses that are not equations, and that don't isolate x.

x is not involved in any sums/differences, so it isn't likely that you need any sums/differences in the inverse.

Answer 33

Look at the equation this way:

\(y=\dfrac{ 2x }{ 11 }\) is the same as \(y=x\cdot\dfrac{ 2 }{ 11 }\)

Now how do you solve that for x? How can you get that x= all alone on the RHS of the equation?

Answer 34

HINT: IF \(t=r\cdot\dfrac{ 5 }{ 13 }\) THEN \(\dfrac{ 13 }{ 5 }\cdot t=r\)

Answer 35

-x -x both sides

Answer 36

@DebbieG

Answer 37

y=13/5?

Answer 38

@Luigi0210 check answer

Answer 39

@hba check anwer please

Answer 40

Where are your variables..?

Answer 41

can u just please just give me the answer im running super late for school please

Answer 42

You have

\(y=x\cdot\dfrac{ 2 }{ 11 }\)

Read my hint above. You can multiply both sides by the reciprocal of 2/11:

Answer 43

\(y=x\cdot\dfrac{ 2 }{ 11 }\)

\(\dfrac{ 11 }{ 2 }\cdot y=x\cdot\dfrac{ 2 }{ 11 }\cdot\dfrac{ 11 }{ 2 }\)

What do you get?

Answer 44

@incognito, if you read above and follow the link to the prior question, you'll see the explanation about his instructor wanting the inverse as a function of y, not of x.

Answer 45

x x 22/22

Answer 46

@romanortiz65 I don't even know what you mean by that.

where is your y??

Where is your = sign?

Answer 47

just give me final answer running late for my senior picture

Answer 48

please

Answer 49

Oh, ok.... I think you mean that's the RHS?? I guess so. But not sure why you have an extra x.

Answer 50

Dude.. it's just one question. It's not like you're gonna die or fail if you don't answer it.

Answer 51

I pretty much did. Just simplify that RHS above and you will have x=???

Answer 52

y=22/22

Answer 53

Well then..

Answer 54

HOW does....

\(\dfrac{ 11 }{ 2 }\cdot y=x\cdot\dfrac{ 2 }{ 11 }\cdot\dfrac{ 11 }{ 2 }\)

Simplify to y=22/22???

1. Where did the fraction go from the LHS??
2. Where did the x go from the RHS??
3. 22/22 is not simplified. It can be made simpler!!

C'mon, man, you are psyching yourself out. You're so convinced that you can't do this that you aren't thinking it through.

Answer 55

11/11

Answer 56

1

Answer 57

\[\dfrac{\cancel 2 }{ \cancel {11} }\cdot\dfrac{\cancel {11} }{\cancel 2 }=1\]

Answer 58

i got this one wrong ;( didnt pass my test

Answer 59

@DebbieG the ?s u helped me were wrongg