# How Do You Determine If F X X 3 1 Is An Even Or Odd Function

neither

To determine if a function is even/odd consider the following.

• If f(x) = f( -x) , then f(x) is even

Even functions have about the y-axis.

• If f( -x) = – f(x) , then f(x) is odd

Odd functions have symmetry about the origin.

**Test for even**

##f(-x)=(-x)^3+1=-x^3+1 ≠f(x)##

Since f(x) ≠ f( -x) , then f(x) is not even.

**Test for odd**

##-f(x)=-(x^3+1)=-x^3-1≠f(-x)##

Since f( -x) ≠ – f(x) , then f(x) is not odd.

##rArrx^3+1″ is neither even nor odd”## graph{x^3+1 [-10, 10, -5, 5]}

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