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Need help plsssss ....................................................

Need help plsssss ....................................................-example-1
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User Rhh
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1 Answer

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Answer:


f^(-1)(x) = \pm√(x) + 2

Explanation:

To find the inverse of a function, we can list out the operations done unto x and invert their opposites.

The operations for the function f(x) = (x − 2)² are:

  1. subtract 2
  2. square

So, the operations for its inverse function will be:

  1. square root
  2. add 2

Finally, we can represent this in equation form:


f^(-1)(x) = √(x) + 2

However, since there is a domain restriction on the principal square root function, we have to add a ± sign in front of the
√(x).


\boxed{f^(-1)(x) = \pm√(x) + 2}

Further Note

Additionally, we know that x must also be positive or 0, as negative numbers do not result in a real output when square rooted, though putting a function's inherent domain restriction after the its definition is not always necessary:


f^(-1)(x) = \pm√(x) + 2, \ x \ge 0

answered
User Prabhat Kasera
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