Question

If the domain of function f is set A and domain of function g is set B, then the domain of function f + g is

• A. $A\cup B$
• B. $A\cap B$
• C. A+B
• D. A-B

Answer 1

The correct option is B $A\cap B$

If function f is defined in the domain A and function g is defined in domain B, then the function f+g is defined for all common elements of set A and B that is $A\cap B$.