The function $\"\"$ have the property that $\"\"$ for all real numbers $\"\"$ and $\"\"$ .

(a)

Consider $\"\"$ .

$\"\"$

Thus, the function $\"\"$ have the given property.

(b)

Consider $\"\"$ .

$\"\"$

Thus, the function $\"\"$ does not have the given property.

(c)

Consider $\"\"$ .

$\"\"$

Thus, the function $\"\"$ does not have the given property.

(d)

Consider $\"\"$ .

$\"\"$

Thus, the function $\"\"$ does not have the given property.

Only the function $\"\"$ have the given property.