Trong mặt phẳng
, cho phép biến hình
xác định như sau: Với mỗi
ta có
sao cho
thỏa mãn
.
![img1](https://cungthi.online/upload/questionbank3_20201220/eduquestion/20191607849110400624/obj20191607849110400624400624_images/obj20191607849110400624400624_img1.png)
![img2](https://cungthi.online/upload/questionbank3_20201220/eduquestion/20191607849110400624/obj20191607849110400624400624_images/obj20191607849110400624400624_img2.png)
![img3](https://cungthi.online/upload/questionbank3_20201220/eduquestion/20191607849110400624/obj20191607849110400624400624_images/obj20191607849110400624400624_img3.png)
![img4](https://cungthi.online/upload/questionbank3_20201220/eduquestion/20191607849110400624/obj20191607849110400624400624_images/obj20191607849110400624400624_img4.png)
![img5](https://cungthi.online/upload/questionbank3_20201220/eduquestion/20191607849110400624/obj20191607849110400624400624_images/obj20191607849110400624400624_img5.png)
![img6](https://cungthi.online/upload/questionbank3_20201220/eduquestion/20191607849110400624/obj20191607849110400624400624_images/obj20191607849110400624400624_img6.png)
A.
là phép tịnh tiến theo vectơ
.
B.
là phép tịnh tiến theo vectơ
.
C.
f là phép tịnh tiến theo vectơ .
D.
f là phép tịnh tiến theo vectơ .
Đáp án và lời giải
Đáp án:D
Lời giải:
Chọn D Ta có .