Question

If f(x) = 2^x then range of the function is?

(a) (-∞, ∞)

(b) (-∞, ∞) – {0}

(c) (0, ∞)

(d) None of the mentioned

I have been asked this question during an online interview.

Enquiry is from Domain and Range of Functions in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

Answer 1

The correct option is (c) (0, ∞)

The explanation: The function cannot take negative values,hence range is (0, ∞).