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If [tex]\( h(x) \)[/tex] is the inverse of [tex]\( f(x) \)[/tex], what is the value of [tex]\( h(f(x)) \)[/tex]?

A. 0
B. 1
C. [tex]\( x \)[/tex]
D. [tex]\( f(x) \)[/tex]


Sagot :

To determine the value of [tex]\( h(f(x)) \)[/tex] given that [tex]\( h(x) \)[/tex] is the inverse of [tex]\( f(x) \)[/tex], let's go through the concepts and definitions step by step:

1. Definition of Inverse Functions:
- If [tex]\( h(x) \)[/tex] is the inverse function of [tex]\( f(x) \)[/tex], it means that applying [tex]\( h \)[/tex] to [tex]\( f \)[/tex] will yield the original input value. Mathematically, this is expressed as:
[tex]\[ h(f(x)) = x \][/tex]

2. Understanding the Identity:
- By definition, for two functions [tex]\( f \)[/tex] and [tex]\( h \)[/tex] to be inverses of each other, we must have:
[tex]\[ h(f(x)) = x \text{ and } f(h(x)) = x \][/tex]
- This means that applying [tex]\( f \)[/tex] and then [tex]\( h \)[/tex] (or vice-versa) should return the input value [tex]\( x \)[/tex].

3. Application to the Question:
- When we have [tex]\( h(x) \)[/tex] as the inverse of [tex]\( f(x) \)[/tex], applying [tex]\( h \)[/tex] after [tex]\( f \)[/tex] should revert [tex]\( f \)[/tex]'s transformation, returning the original [tex]\( x \)[/tex].

Thus, the value of [tex]\( h(f(x)) \)[/tex] is indeed:

[tex]\[ \boxed{x} \][/tex]
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