1. For each of the following relations, indicate whether it is a function. If it is a function, give its range. If it is not a function, explain why. f:R → R such that f(x) = Vx а. b. f:R → R such that f(x) = Vx²

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter3: Functions
Section3.7: Inverse Functions
Problem 2SE: Why do we restrict the domain of the function f(x)=x2 to find the function's inverse?
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1.
For each of the following relations, indicate whether it is a function. If it is a function,
give its range. If it is not a function, explain why.
f:R → R such that f(x) = Vx
а.
b.
f:R → R such that f(x) = Vx?
2.
For each of the following functions, indicate whether it is invertible. If it is invertible,
give its inverse. If it is not invertible, explain why.
f:Z → Z such that f (x) = x – 2
f:Z → Z such that f (x) = 2x + 1
а.
b.
3.
Prove that the following function is not injective (one-to-one) and not surjective (onto).
Hint: find a counterexample.
f:R → R such that f(x) = |x – 1|
Transcribed Image Text:1. For each of the following relations, indicate whether it is a function. If it is a function, give its range. If it is not a function, explain why. f:R → R such that f(x) = Vx а. b. f:R → R such that f(x) = Vx? 2. For each of the following functions, indicate whether it is invertible. If it is invertible, give its inverse. If it is not invertible, explain why. f:Z → Z such that f (x) = x – 2 f:Z → Z such that f (x) = 2x + 1 а. b. 3. Prove that the following function is not injective (one-to-one) and not surjective (onto). Hint: find a counterexample. f:R → R such that f(x) = |x – 1|
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