Yahoo Answers: Answers and Comments for Let f(x) be a function with the following two properties: a.) for any two real numbers x and y, f(x+y)=x+f(y).? [Mathematics]
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From LOST
enUS
Tue, 10 Feb 2009 17:40:49 +0000
3
Yahoo Answers: Answers and Comments for Let f(x) be a function with the following two properties: a.) for any two real numbers x and y, f(x+y)=x+f(y).? [Mathematics]
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From michy09999: f(x+y)=x+f(y)
f(2009) = f(2009 + 0) = 2009 ...
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Wed, 11 Feb 2009 01:44:20 +0000
f(x+y)=x+f(y)
f(2009) = f(2009 + 0) = 2009 + f(0) = 2009 + 2 = 2011

From Grampy 1901: Well, from what you say,
f(2009) = f(2009 +...
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Wed, 11 Feb 2009 01:49:27 +0000
Well, from what you say,
f(2009) = f(2009 + 0) = 2009 + f(0)
Looks like you can probably do the rest.
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P.S.: Hehe, looks like these old fingers clack on the computer too slowly! Mr. Michy and Mr. Corben are both correct. One thing you might try to do is prove to yourself that this can only happen if f(x) = 2 + x.

From Mathew: ... ... ... You must be kidding me.
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Wed, 11 Feb 2009 01:47:36 +0000
... ... ... You must be kidding me.

From Corben D: f(2009+0) = 2009 +f(0) = 2011.
I arrived a ...
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Wed, 11 Feb 2009 01:44:26 +0000
f(2009+0) = 2009 +f(0) = 2011.
I arrived a few seconds after michy, but I agree with him.

From Anonymous: x as in you don't have one, Or that it has...
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Wed, 11 Feb 2009 01:45:58 +0000
x as in you don't have one, Or that it has somehow abondoned you? It's your ex penis, you don't hang out anymore but you can't seem to make those feelings go away