If f(x) = x+1 what is the domain of the function f(x)?

Answer 1

Looks to me as if it could be anything numerically compatible with the "+" operation, and an additional (pun intended!) operand of "1". In other words, don't throw a monkey wrench in, literally.

If you have other restrictions (such as, non-negative vs. negative or non-negative, integer vs. real, real vs. complex, and so on) those might restrict your domain, since there are some numbers you "can't" choose.

Note for the future: usually, domain restrictions are imposed by the input limitations of the operations in your function expression, for example, the square root operation requires a non-negative input only (unless you are in the complex number system!), division requires a non-zero denominator, etc.

-- Cheers, --Mr. d.

Answer 2

Hi Ana A

Ask yourself if there any number that x cannot be?

Is there any real number that violates your function?