2009 DAT QR #39

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Creeko

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Sorry if I am doing the wrong. This is my first time posting something here... I do not understand this question and I was hoping to get some help.

#39
If "f" is a function that satisfies f(x+y)=f(x)f:thumbup: for all real numbers "x" and "y". Which of the following must be of f(0)?

A. f(0)=1
B. f(0)=0
C. Either f(0)=1 or f(0)=0
D. Insufficient information to draw a conclusion




Answer: A
 
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