CMR1×2-1/2!+2×3-1/2!+3×4-1/4!+...+2023×2024/2024!<2
Bài 5 : Tính hợp lý ;
1/2 + 1/4 = 1/2024
cho a =1/3 - 2/3*2 + 3/3*3 - 4/3*4 + 5/3*5 - ...... + 2023/3*2023 - 2024/3*2024 hãy so sánh a với 20/3
1) Tính hợp lý :
P=1-2-3+4+5-6-7+8+.........+2021-2022-2023+2024
1-2+3-4+5-6+7-8+...+2023-2024
1: \(\dfrac{2}{3}\): \(\dfrac{3}{4}\) :\(\dfrac{4}{5}\) :.....:\(\dfrac{2024}{2025}\)
P=1-2-3+4+5-6-7+8+.........+2023-2024
(1-1/2) (1-1/3) (1-1/4)... (1-1/2023) (1-1/2024)
1+1/2*(1+2)+1/3*(1+2+3)+...+1/2024*(1+2+3+...+2024)