Các câu hỏi tương tự
Tính nhanh:2/1x2x3+2/2x3x4+2/3x4x5+2/4x5x6+2/5x6x7+2/6x7x8
Giúp mình với!Thanks
1x2x3+2x3x4+3x4x5+...+98x99x100
1x2x3+2x3x4+3x4x5+....+2018x2019
A=1x2x3+2x3x4+3x4x5+...+99.100.101
B=1x2x3+2x3x4+3x4x5+...+48x49x50 = ?
1x2x3+2x3x4+3x4x5+...+98x99x100
A=64+151+136+49;B=1x2x3+2x3x4+3x4x5+...+48x49x50
tính tổng sau :
A=1x2x3+2x3x4+3x4x5+..............+99x100x101.
2/1x2x3 + 2/2x3x4 + 2/3x4x5 + ... + 2/36x37x38 + 2/37x38x39