Mathematics 10 — Exercise Review · Q1 (iv)

Full question

When is x + iy pure imaginary? Choose the correct option.

i \times y + x

Option	Value
a	y = 0
b	x = 0
c	i = 0
d	x = 0, y = 0

Step-by-step solution

Pure imaginary means real part x = 0 (with y ≠ 0 if zero is excluded).

Answer

b: x = 0