2023-1/2*(1+2)-1/3*(1+2+3)-1/4*(1+2+3+4)-...-1/2022*(1+2+3+4+...+2022)
Tính: 1/(1+2+3) + 1/(1+2+3+4) + 1/(1+2+3+4+5) + ... + 1/(1+2+3+...+2023)
c=(1/2^(2)-1)*(1/3^(2)-1)*(1/4^(2)-1)...(1/2023^(2)-1)
1/2 +1/3+1/4+...+ 1/2023+ 1/2024
B=1/2-1/2^2+1/2^3-1/2^4+..... -1/2^2022+1/2^2023
Thu gọn B
-3/4 + -1/4 + 2/7 + 5/7 + 2023/2024
2/3x = 2/7
2/3x - 1/2 = 1/10
B= 1/2 + 1/3 - 1/4 +...- 1/2022 + 1/2023 C= 1/1012 + 1/1013+...+ 1/2022 + 1/2023
Tính: B-C
mọi người sửa nhanh giúp mik vs ạ
cho \(A=\)\(1+\dfrac{1}{2}+\dfrac{1}{3}+...+\dfrac{1}{2^{2023}-1}\). CMR \(A\)\(< \dfrac{2023}{2}\)
Cho \(A=1+\dfrac{1}{2}+\dfrac{1}{3}+...+\dfrac{1}{2^{2023}-1}\) CMR: \(A>\dfrac{2023}{2}\)