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Rút gọn: (3 + 1)(3^2 + 1)(3^4 + 1)(3^8 + 1)(3^16 + 1)(3^32 + 1)
A=(3 + 1)(3^2 + 1)(3^4 + 1)(3^8 + 1)(3^16 + 1)(3^32 + 1)
2A=2(3 + 1)(3^2 + 1)(3^4 + 1)(3^8 + 1)(3^16 + 1)(3^32 + 1)
2A=(3-1)(3 + 1)(3^2 + 1)(3^4 + 1)(3^8 + 1)(3^16 + 1)(3^32 + 1)
2A=(3^2-1)(3^2 + 1)(3^4 + 1)(3^8 + 1)(3^16 + 1)(3^32 + 1)
2A=(3^4-1)(3^4 + 1)(3^8 + 1)(3^16 + 1)(3^32 + 1)
2A=(3^8-1)(3^8 + 1)(3^16 + 1)(3^32 + 1)
2A=(3^16-1)(3^16 + 1)(3^32 + 1)
2A=(3^32 - 1)(3^32 + 1)
2A=3^64-1
=>A=(3^64-1) /2
`=>` To answer the question "how long will it take to sell 1 billion packages of sesame", more information is needed about the speed at which sesame is sold. For example, the number of sesame packages sold per day, per month, or per year.
Đáp án B
Impinge upon something: Ảnh hướng đến cái gì
Affect (v): ảnh hưởng
Prohibit (v): cấm
Vary (v): đa dạng
Improve (v): tiến bộ
1. It is a long time since we last met.
We haven't..met for a long time..
2. The fire badly damaged the town hall.
The town hall...was badly damged by the fire
3 The police haven't found the flood victim yet.
The flood victims..haven't been found by the police
1: We haven't met for a long time
2: The town hall was badly damaged by the fire
3: The flood victims haven't found by the police yet
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