Let f(x)=54x+1. If f−1(x)=20, then which of the following expressions can be used to find the corresponding value of x? 54(20)+1=x 54(−20)+1=x 54x+1=−20 54x+1=20
Let f(x)=54x+1. If f−1(x)=20, then which of the following expressions can be used to find the corresponding value of x? 54(20)+1=x 54(−20)+1=x 54x+1=−20 54x+1=20
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section: Chapter Questions
Problem 63RE
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Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
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A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
Question
Let f(x)=54x+1. If f−1(x)=20, then which of the following expressions can be used to find the corresponding value of x?
-
54(20)+1=x
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54(−20)+1=x
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54x+1=−20
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54x+1=20
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