Recall that a function is called one-to-one on an interval I if, for any a, b e I, if f(a) = f(b), then a = = b. Prove that if f' > 0 on I, then f is one-to-one on I.

College Algebra
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ISBN:9781938168383
Author:Jay Abramson
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Chapter3: Functions
Section3.3: Rates Of Change And Behavior Of Graphs
Problem 2SE: If a functionfis increasing on (a,b) and decreasing on (b,c) , then what can be said about the local...
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Recall that a function is called one-to-one on an interval I if, for any
a, b e I, if f(a) = f(b), then a = b.
Prove that if f' > 0 on I, then f is one-to-one on I.
Transcribed Image Text:Recall that a function is called one-to-one on an interval I if, for any a, b e I, if f(a) = f(b), then a = b. Prove that if f' > 0 on I, then f is one-to-one on I.
Expert Solution
Step 1

i am using mean value theorem (MVT)

definition MVT

suppose that f is continuous on a closed intereval I:=a,b and that f has derivative in open interval a,b then there exit at  least one point c in a,b such that f(b)-f(a)= f'c (b-a) 

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