Identify the number as real, complex, pure imaginary, or nonreal complex. More than one of these descriptions may
-$5 \mathrm { i }$
A) complex, pure imaginary
B) real
C) real, complex
D) complex, nonreal complex

Question

Quizplus · Accepted Answer

The number $5i$ is a complex number because it involves $i$, the imaginary unit. It is also purely imaginary because it has no real part; its real part is 0.

Identify the Number as Real, Complex, Pure Imaginary, or Nonreal 5i5 \mathrm { i }5i

Identify the Number as Real, Complex, Pure Imaginary, or Nonreal $5 \mathrm { i }$