Prove (f+g)(x) = f(x) + g(x)

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  • #1
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where f and g are finctions of x

please thanks
 

Answers and Replies

  • #2
62
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you mean "functions"...
 
  • #3
49
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that's a definition as far as I am concerned. How are you defining (f+g)(x)?
 
  • #4
This appears to be the definition of the sum of two functions. It is valid as long as f and g have the same domains and ranges.
 
  • #5
JasonRox
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This appears to be the definition of the sum of two functions. It is valid as long as f and g have the same domains and ranges.
They don't need the same range.

Try sin(x) + x.
 

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