M=(-1)+(-1)+...+(-1)+2023
=-1011+2023
=1012
so sánh b=1/2022+2/2021+3/2020+...+2021/2+2022/1 VÀ c=1/2+1/3+1/4+...+1/2022+1/2023
A=1-2-3+4+5-6-7+..+2021-2022-2023
\(\dfrac{\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{2023}}{\dfrac{2022}{1}+\dfrac{2021}{2}+\dfrac{2020}{3}+...+\dfrac{1}{2022}}\)
Tính nhanh C=1/1*2*3+1/2*3*4+1/3*4*5+........+1/2021*2022*2023
d) 1- 2 +3 -4+ ... +2021- 2022+ 2023. Giúp mik vs ạ^^
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 = \(\dfrac{2022}{1}\) + \(\dfrac{2021}{2}\) + \(\dfrac{2020}{3}\)
+ ... + \(\dfrac{1}{2022}\)
1-2-3+4+5-6-7+8+...+2018-2019-2020+2021+2022-2023
1. Rút gọn các biểu thức sau:
A= 1 - 2 + 3 - 4 + 5 - 6 + ... + 2021 - 2022 + 2023
