Các câu hỏi tương tự
1*2*3+2*3*4+3*4*5+....+97*98*99+98*99*100 = ?
99/1+98/2+97/3+................+2/98+1/99
1/2+1/3+1/4+.......................+1/99+1/100
Tính nhanh
a.(1+1/2)×(1+1/3)×(1+1/4)×...×(1+1/98)×(1+1/99).
b.1/2×2/3×3/4×...×97/98×98/99×99/100
100-99+98-97+............+4-3+2-1
1+2-3-4+...+97+98-99-100
1+2+3+4+....+96+97+98+99+100
1+2+3+4+5+...+97+98+99+100=
a= 100+99-98-97+.......+4+3-2-1
1/2 +2/3 +3/4 +4/5+..+99/100
1/99+2/98 +3/97+...+98/2+99/1
help me,ai giải nhanh nhất tớ tick cho