Question

Which of the following is a true imaginary number.

Answer 1

5
5+2i
sqrt3
sqrt-2

Answer 2

Would it not be B because of the i? I dunno im just learning these things...

Answer 3

Thats what i was thinking but 5 is real

Answer 4

5------------>natural number
5+2i---------->complex(5->real part 2i-> imaginary part)
sqrt3---------->irrational number
sqrt-2---------->pure imaginary \(\large \sqrt{2}\times i,i=\sqrt{-1}\)

Answer 5

so would you say all -sqrts would be imaginary?