hi bn

"Thế giới ảo có hàng triệu người, sao bạn lại vinh dự nhận được lời chào từ mình nhỉ?"

chào bạn nha

2016+2017+2018+2019+2020=10090 nak bn

câu hỏi:

2016+2017+2018+2019+2020= ?

Trả lời:

2016+2017+2018+2019+2020= 10090

Cô chào em, chúc em 1 buổi tối vui vẻ bên gia đình! ^^

hòi cô phải giáo viên ko vậy ạ

hi

hi bn nha :>

Ahhhs plsssss ai đó vào giúp tôiiiiiiiis

6,034.10\(^{23}\)

= 6034.10\(^{-3}\).10\(^{23}\)

= 6034.(10\(^{-3}\).10\(^{23}\))

= 6034.(10\(^{-3+23})\)

= 6034.10\(^{20}\)

\(\left(\dfrac{1}{38}-1\right).\left(\dfrac{1}{37}-1\right).\left(\dfrac{1}{36}-1\right)....\left(\dfrac{1}{2}-1\right)\)

\(=\left(\dfrac{1}{38}-\dfrac{38}{38}\right).\left(\dfrac{1}{37}-\dfrac{37}{37}\right).\left(\dfrac{1}{36}-\dfrac{36}{36}\right)....\left(\dfrac{1}{2}-\dfrac{2}{2}\right)\)

\(=\left(\dfrac{-37}{38}\right).\left(\dfrac{-36}{37}\right).\left(\dfrac{-35}{36}\right)...\left(\dfrac{-1}{2}\right)\)

\(=\left(\dfrac{-1}{38}\right).\left(\dfrac{-1}{1}\right).\left(\dfrac{-1}{1}\right).....\left(-\dfrac{1}{1}\right)\)

\(=\left(\dfrac{-1}{38}\right).\left(-1\right).\left(-1\right).....\left(-1\right)\)

\(=\dfrac{\left(-1\right).\left(-1\right).....\left(-1\right)}{38}\)

\(=\dfrac{\left(-1\right)^{38}}{38}\)

\(=\dfrac{1}{38}\)

Ta có: \(33^{29}>30^{29}=\left(2.15\right)^{29}=2^{29}.15^{29}\)

         \(15^{31}=15^2.15^{29}\)

Ta có: \(2^{29}>15^2\)

\(\Rightarrow2^{29}.15^{29}>15^2.15^{29}\)

\(30^{29}>15^{31}\)

\(\Rightarrow33^{29}>15^{31}\)

Vậy \(33^{29}>15^{31}\)

Tham khảo nhé~