Đặt A = 1 + 2 - 3 - 4 + ... + 97 + 98 - 99 - 100

Biểu thức A có : (100 - 1) : 1 + 1 = 100 (số hạng)

Nhóm 4 số hạng thành một nhóm ta được : 100 : 4 = 25 (nhóm)

=> A = (1 + 2 - 3 - 4) + ... + (97 + 98 - 99 - 100)

=> A = (-4) + ... + (-4)

=> A = (-4) . 25

=> A = -100

Vậy A = -100

-43 * (1 - 296) - 296 * 43

= -43 * 1 - 43 * (-296) - 43 * 296

= -43 * (1 - 296 + 296)

= -43 * 1 = -43

\(=x^2-2xy+y^2-\left(y^2-2yx+x^2\right)\)

=0

1. There are ten rooms in the hotel.

2. There is a bookshelf in Elena's room.

1. There are ten rooms in the hotel.

2. There is a bookshelf in Elena room.

\(9^{11}\cdot9^5=9^{11+5}=9^{16}\)

\(9^{11}\cdot9^5=9^{11+5}=9^{16}\)

My smartphone is an essential part of my daily routine. I mostly use it for communication, texting friends and family, and making calls throughout the day. It’s also my main tool for accessing information, whether it’s checking the weather, reading news, or finding directions. I probably use it dozens of times an hour for various quick tasks.

I believe smartphones will evolve dramatically in the future. Instead of handheld devices, they might transform into more integrated technologies like smart glasses or even subtle implants. The focus will shift towards seamless interaction and augmented reality, making our digital and physical worlds blend even more effortlessly. Their form may change, but their central role in our lives will undoubtedly remain.

She should go to the doctor because she has an earache.

She should go to the doctor because she has an earache.

24 : 8 = 3

24 : 8 = 3

\(3^7\cdot9=3^7\cdot3^2=3^{7+2}=3^9=19683\)

19683.

=4096

\(2^3\cdot4=8\cdot4=32\)