Đáp án:
$a)
A'(-2;7)\\
b)
B'(-3;8)\\
c)
D(3;3)\\$
Giải thích các bước giải:
$a)
T_{\overrightarrow{v}}(A)=A'(x',y')\\
\Rightarrow {\left\{\begin{aligned}x'=-3+1=-2\\y'=4+3=7\end{aligned}\right.}\\
\Rightarrow A'(-2;7)\\
b)
\overrightarrow{AC}=(-1;4)\\
T_{\overrightarrow{AC}}(B)=B'(x';y')\\
\Rightarrow {\left\{\begin{aligned}x'=-1+(-2)=-3\\y'=4+4=8\end{aligned}\right.}\\
\Rightarrow B'(-3;8)\\
c)
T_{\overrightarrow{v}}(D)=C(0;7)\\
\Rightarrow {\left\{\begin{aligned}x=0-(-3)=3\\y=7-4=3\end{aligned}\right.}\\
\Rightarrow D(3;3)\\$