### Home > CALC > Chapter 1 > Lesson 1.5.1 > Problem 1-203

1-203.

Reflective symmetry across the *y*-axis means that *f*(*x*) is an even function. The definition of even functions is *f*(*x*) = *f*(−*x*).

Evaluate *f*(−*x*)...

1-203.

Reflective symmetry across the *y*-axis means that *f*(*x*) is an even function. The definition of even functions is *f*(*x*) = *f*(−*x*).

Evaluate *f*(−*x*)...