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Combine like terms in the equation f(x)=-f(x)_______=0

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Given


f(x)=-f(x)

We can sum f(x) on both sides, and we will get


f(x)+f(x)=-f(x)+f(x)_{}

But -f(x) + f(x) = 0, then


f(x)+f(x)=0

Now we can combine the terms and we get


2\cdot f(x)=0

Divide both sides by 2


f(x)=0

And here we have solved our problem. That's the only function that is odd and even at the same time, the graph of this function is basically the x-axis because it's a constant in y = 0, we can see even and odd because


f(x)=0,\forall x\in\R

Therefore


\begin{gathered} f(x)=0=f(-x) \\ \\ f(x)=0=-f(x) \end{gathered}

Odd and even at the same time.

User Jonathan Seed
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