[SPLIT] f(x) = 2x + 6 and f ^-1 =( x - 6 ) / 2

[wiishesssss]

f(x) = 2x + 6
f ^-1 =( x - 6 ) / 2

(f o f^-1)(x)
(f o f^-1)(100)

f(x) = 2x + 6
2((100-6)/2) + 6
2(47) + 6 = 100

does that look good?

 

[stapel]

does that look good?

I don't know. What was the original exercise? What were the instructions? What are you doing?

Please be specific. Thank you.

Eliz.

 

[wiishesssss]

The question is what is the value of (f o f^-1)(100)?

and
f(x) = 2x+6
f^-1 = (x-6)/2

 

[stapel]

Since the function provided is clearly invertible (since it obeys the Horizontal Line Test), the computations are unnecessary. Just apply the definition of a function and its inverse.

Eliz.