gaokao 2015 Q2

gaokao · China · national-II-arts Complex Numbers Arithmetic Systems of Equations via Real and Imaginary Part Matching

2. If $a$ is a real number and $\frac { 2 + a i } { 1 + i } = 3 + i$, then $a =$
A. $- 4$
B. $- 3$
C. $3$
D. $4$

2. If $a$ is a real number and $\frac { 2 + a i } { 1 + i } = 3 + i$, then $a =$\\
A. $- 4$\\
B. $- 3$\\
C. $3$\\
D. $4$