Compare:
A=26.26*4949.49 and B= 49.49*2626.26
Answer:A..............B
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Trích:
Ta có : n.n! = [(n + 1) - 1].n! = (n + 1).n! - n! = 1.2.3.....n.(n + 1) - n! = (n + 1)! - n! N = 1.1! + 2.2! + 3.3! + ... + n.n! = 2! - 1! + 3! - 2! + 4! - 3! + ... + (n + 1)! - n! = - 1! + (n + 1)! = (n + 1)! - 1 |
Trích:
1.1!+2.2!+3.3!+4.4!+5.5! =(2-1).1!+(3-1).2!+(4-1).3!+ (5-1).4!+(6-1).5! =2!-1!+3!-2!+4!-3!+5!-4!+6!-5! =6!-1!=720-1=719 |
B = 49.(49 + 1).(2 . 49 + 1) / 6 = 40425
C = 4.(12 + 22 + … + 242 ) = 4.24.(24 + 1)(2.24 + 1) / 6 = 19600
S= 1/2 - 1/2 + 1/3 - 1/3 + 1/4 - 1/4 +...+ 1/50 - 1/50
S= 0 + 0 + 0 +...+ 0
S= 0
Mr. Amazing Lives in London. He is tall and dark and wears a black Uniforn and a blue cape. He Works as a police officer and Rides a motorbike. He can see and hear very Well and he is very strong. He Fights crime and saves people from dange.
Mr. Amazing..LIVES. in London. He is tall and dark and wears a black.UNIFORM.. and a blue cape. He..WORKS. as a police officer and..RIDES. a motorbike. He can see and hear very..WELL. and he is very strong. He.FIGHTS.. crime and saves people from dange.
Fill in the blank with the mising words: is, has, orwear(s). And translate the passage into Vietnamese.
Kevin (1)______IS__ short and slim. He (2)_______WEARS_ glasses and he (3)___HAS_____ blue eyes. His hair (4)___IS_____ brown and curly.
Tom (5)____IS____ short and slim. He (6)______WEARS__ glasses and he (7)_____HAS___ green eyes. His hair (8)____IS____ long, brown, and wavy.
Paul (9)____IS____ tall. He doesn't (10)______WEAR__ glasses. He (11)______HAS__ brown eyes, and his hair (12)_______IS_ brown and curly.
Ben (13)_____IS___ short. He (14)______HAS__ brown eyes and his hair (15)______IS__ long, black and straight.
1 . is
2. wears
3 . has
4 . is
5 . is
6 . wears
7 . has
8 . is
9 . is
10 . wear
11 . has
12 . is
13 . is
14 . has
15 . is
Chúc bạn học tốt
VI. Fill in the blanks with the missing words: is, has, or wear(s). And translate the passage into Vietnamese.
Kevin (1) _____is____ short and slim. He (2) _____wears____ glasses and he (3) ____has_____ blue eyes. His hair (4) _____is___ blown and curly.
Tom (5) ____is____ short and slim. He (6) _____wears____ glasses and he (7) _____has____ green eyes. His hair (8) ______is____ long, brown and wavy.
Paul (9) _____is____ tall. He doesn’t (10) _____wear____ glasses. He(11) _____has____brown eyes, and his hair (12) _____is____ brown and curly.
Ben (13) ____is____ short. He (14) _____has____brown eyes and his hair (15) ____is___ long, black and traight.
Kevin (1) ____is_____ short and slim. He (2) ____wears_____ glasses and he (3) ____has_____ blue eyes. His hair (4) __is______ blown and curly.
Tom (5) ___is_____ short and slim. He (6) ____wears_____ glasses and he (7) _____has____ green eyes. His hair (8) ____is______ long, brown and wavy.
Paul (9) ____is_____ tall. He doesn’t (10) ____wear_____ glasses. He(11) ____has_____brown eyes, and his hair (12) ____is_____ brown and curly.
Ben (13) ____is____ short. He (14) ___has______brown eyes and his hair (15) ___is____ long, black and traight.
*Translate into Vietnamese:
Kevin thấp và mảnh khảnh. Anh ấy đeo kính và có đôi mắt xanh dương. Tóc anh ấy phồng và xoăn.
Tom thấp và mảnh khảnh. Anh ấy đeo kính và có đôi mắt xanh lục. Tóc anh ấy dài, màu nâu và gợn sóng.
Paul cao. Anh ấy không đeo kính. Anh ấy có đôi mắt nâu, và tóc anh ấy màu nâu và xoăn.
Ben thấp. Anh ấy có mắt màu nâu và tóc anh ấy dài, đen và thằng.
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