Trong không gian với hệ trục tọa độ Oxyz. Mặt phẳng (P) đi qua điểm M(1;27;8) cắt các tia Ox,Oy, Oz lần lượt tại A, B, C sao cho A B 2 + B C 2 + C A 2  nhỏ nhất có phương trình là

A.  6 x + 2 y + 3 z − 84 = 0.

B.  6 x − 2 y + 3 z + 24 = 0.

C.  6 x − 2 y − 3 z + 72 = 0.

D.  6 x + 2 y − 3 z − 36 = 0.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

A native speaker of Spanish, for example, will __ to learn than a native speaker of Chinese

A. find Portuguese much easier

B. find that Portuguese is much easy

C. find Portuguese much easy

D. find Portuguese is much easier

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

It is very (A) difficult for (B) her to prevent (C) him for smoking (D) in her house.

A. very

B. for

C. prevent

D. for smoking