Find the inverse of a given function, Algebra

Assignment Help:

Given f ( x ) = 3x - 2 find f -1 ( x ).

Solution

Now, already we know what the inverse to this function is as already we've done some work with it.  Though, it would be nice to really start with this as we know what we must get. it will work as a nice verification of the procedure.

We'll first replace f ( x ) with y.

                                           y = 3x - 2

Next, replace all x's with y & all y's with x.

                                            x =3 y - 2

Now, solve out for y.

x + 2 = 3 y

1 /3 (x + 2) = y

x/3 + 2/3=y

At last replace y with f -1 ( x ) .

                                         f -1 ( x )  = x/3 + 2/3

Now, we have to verify the results.  Already we took care of this in the earlier section; though, we actually should follow the procedure so we'll do that here. It doesn't issue which of the two that we verify we just have to check one of them.  This time we'll verify that

( f o f -1 )( x ) = x is true.

 ( f o f -1 )( x ) = f[ f -1 ( x )]

                       = f [x/3 + 2 /3]

                      =   3( x /3 + 2/3 ) - 2

                     = x + 2 - 2

                         =


Related Discussions:- Find the inverse of a given function

Determine the two zeroes - factor theorem, Given that x=2 is a zero of P ( ...

Given that x=2 is a zero of P ( x ) = x 3 + 2x 2 - 5x - 6 determine the other two zeroes. Solution Firstly, notice that we actually can say the other two since we know th

Equations, What type of equation is used if a ball is thrown upward 1.63 me...

What type of equation is used if a ball is thrown upward 1.63 meters off the ground and it reaches 3.34 meters in height at 0.6 seconds before falling to the ground?

., what the hell is the problem to this solution .

what the hell is the problem to this solution .

Exchange rate, #question. in january sunanda changed 25000 pounds into doll...

#question. in january sunanda changed 25000 pounds into dollars when the exchange rate was $1.96= 1 pounin june she changed the dallars back into when the exchange rate was $1.75=1

Factoring, x^2 + 7x + 12 factor fully

x^2 + 7x + 12 factor fully

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd