Question

Select the correct answer.
Which of these is a non-real complex number?

Answer 1

C

Explanation:

`\frac 83 +√(-\frac 73)\\\\=\frac 83 + √(-1) √(\frac 73)\\\\=\frac 83 +i√(\frac 73)~~~~~~;\left[i =√(-1)\right]\\\\\text{It is now in the standard form of complex number (a+bi).}`