=-1/10(-21,22+11,22)+2021/2023(2025-2)
=2021-1/10*(-10)
=2021+1=2022
=-1/10(-21,22+11,22)+2021/2023(2025-2)
=2021-1/10*(-10)
=2021+1=2022
So sánh:
A=\(\dfrac{10^{2022}+1}{10^{2023}+1}\) và B=\(\dfrac{10^{2021}+1}{10^{2022}+1}\)
So sánh \(A=\dfrac{2022}{50^{10}}+\dfrac{2022}{50^8};B=\dfrac{2023}{50^{10}}+\dfrac{2021}{50^8}.\)
Giúp mình với ạ, mai mình thi rồi. ☘️Xin cảm ơn☘️
1. Tính một cách hợp lí :
a) 2021+2022+2023+2024+2025+2026+2027+2028+2029 ;
b) 30.40.50.60 ( dấu. là dấu nhân )
giúp e vs ạ
\(\dfrac{\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{2023}}{\dfrac{2022}{1}+\dfrac{2021}{2}+\dfrac{2020}{3}+...+\dfrac{1}{2022}}\)
Cho em xin hỏi bài toán này ạ! Em xin cảm ơn !
1/2021×2022+1/2022×2023+1/2023×2024+1/2024×2025-4/2021×2025=
Tìm x, biết:
( \(\dfrac{1}{2}\) + \(\dfrac{1}{3}\) + \(\dfrac{1}{4}\) + ... + \(\dfrac{1}{2023}\) ) . x = \(\dfrac{2022}{1}\) + \(\dfrac{2021}{2}\) + \(\dfrac{2020}{3}\)
+ ... + \(\dfrac{1}{2022}\)
So sánh:
a) A=\(\dfrac{98^{88}+1}{98^{98}+1}\)và B=\(\dfrac{98^{89}+1}{98^{99}+1}\) b) C=\(\dfrac{2022^{2023}+1}{2022^{2021}+1}\)và D=\(\dfrac{2022^{2021}+1}{2022^{2019}+1}\)
\(\dfrac{7}{1.3}\) + \(\dfrac{7}{3.5}\) + \(\dfrac{7}{5.7}\) + ... + \(\dfrac{7}{2021+2023}\)
Tính(hợp lí nếu có thể)
H=1-3+5-7+...+2021-2023+2025