Which pair of expressions represents inverse functions?
a. 4x+2/x-3 and 5x+3/4x-2
b. x+3/4x-2 and 2x+3/4x-1
c. 4-3x/4x-2 and x+2/x-2
d. 2x+5 and 2+5x

Respuesta :

Riia

In this question , we have to find, which option represents inverse functions.

Let's check out option b

Let it be y

So we have

[tex] y = \frac{x+3}{4x-2} [/tex]

Switching x and y and solving for y,

[tex] x = \frac{y+3}{4y-2} [/tex]

Performing cross multiplication

[tex] 4xy -2x = y+3 [/tex]

Combining like terms

[tex] y(4x-1) = 3+2x [/tex]

[tex] y = \frac{2x+3}{4x-1} \\ f^{-1} (x) = \frac{2x+3}{4x-1} [/tex]

Which is same as of the other function.

So correct option is b .

Answer:

b

Step-by-step explanation:

Which pair of expressions represents inverse functions?

A.  

and  

B.  

and  

C.  

and  

D.  

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