# All of the functions that achieve defined

1. ### m_s_a

91
If you allowed they helped me

All of the functions that achieve defined

if f A defined function in R X R

f(x) + f ( y2 ) = f ( x2 +y)

91

3. ### Pere Callahan

587
Is your question to find all functions $f:\mathbb{R}\to\mathbb{R}$ such that $f(x)+f(y^2)=f(x^2+y)\quad\forall x,y \in \mathbb{R}$?

If you want us to help you, show some effort. What have you tried so far?

Last edited: Apr 10, 2008
4. ### m_s_a

91
Yes O my friend what I want
And I thank you for your cooperation with me

5. ### Pere Callahan

587
Is the function defined on R or on RxR...?

Take some special values for x and y, like x=0, or y=0 or x=y and see where it takes you.

6. ### m_s_a

91
With the use of the drawing programs they came to y =x
But the wanted is the solution compulsorily
I believe by Al Mtslslat
The question I do not know how I deal with it a new for me .

7. ### Pere Callahan

587
Sorry, I do not understand what you are saying. I suggest you try and find someone to help you who speaks your language.

8. ### m_s_a

91
I mean the solution by the Khawarizmi way

And thank you to your aid