How many functions f:R→R exists such that : 2f(x)+2f(y)=f(x+y)+f(x−y)+2y holds for all real x and y?
How many functions f:R→R exists such that : 2f(x)+2f(y)=f(x+y)+f(x−y)+2y holds for all real x and y?
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.2: Exponential Functions
Problem 58E
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How many functions f:R→R exists such that :
2f(x)+2f(y)=f(x+y)+f(x−y)+2y
holds for all real x and y?
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