Z = Z' U 0 U Z+

(العلامة دي ' أقصد بيها الأس السالب ودي (+Z)أقصد بيها Z الموجبة )

-f(x) = f(-x)
f is

f(x) = f(-x)
f is

-f(x) ≠ f(-x) and
f(x) ≠ f(-x)

.... is symmetric about origin point

.... is symmetric about y-axis

Domain (f∘g)(x) =

The sum of two even functions is

the sum of two odd functions is

The difference of two even functions is

the difference of two odd functions is

The product of two even functions is

the product of two odd functions is

The product of an even function and an odd function is

The quotient of two even functions is

the quotient of two odd functions is

The quotient of an even function and an odd function is

The derivative of an even function is

the derivative of an odd function is

The composition of two even functions is