gaokao 2025 Q1

gaokao · China · national-I_eol 5 marks Complex Numbers Arithmetic Identifying Real/Imaginary Parts or Components

The imaginary part of $(1 + 5i)i$ is
A. $-1$
B. $0$
C. $1$
D. $6$

The imaginary part of $(1 + 5i)i$ is\\
A. $-1$\\
B. $0$\\
C. $1$\\
D. $6$