Các câu hỏi tương tự
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
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
A = 100+99-98-97+96+...+4+3-2-1
Tính A:B
a)A=98+1/2+1/3+1/4+...+1/99
B=2/3+4/3+5/4+...+100/99
b)A=2018+1/2+1/3+1/4+...+1/2019
B=3/2+4/3+3/4+...+2020/2019
c)A=99/1+98/2+97/3+...+2/98+1/99
B=1/2+1/3+1/4+...+1/100
Giải đầy đủ
a=100+99-98-97+96-95-94-93+...+4+3-2-1
A=100+99-98-97+96+95-94-93+.....+4+3-2-1
a=100+99-98-97+96+95-94-93...+4+3-2-1
A=100+99-98*97+96+95-94-93+...+4+3-2-1