\(\dfrac{1}{2}\cdot\dfrac{2}{3}\cdot\dfrac{3}{4}\cdot...\cdot\dfrac{99}{100}=1\cdot\dfrac{2}{2}\cdot\dfrac{3}{3}\cdot...\cdot\dfrac{99}{99}\cdot\dfrac{1}{100}=\dfrac{1}{100}\)
\(\dfrac{1}{2}\cdot\dfrac{2}{3}\cdot\dfrac{3}{4}\cdot...\cdot\dfrac{99}{100}=1\cdot\dfrac{2}{2}\cdot\dfrac{3}{3}\cdot...\cdot\dfrac{99}{99}\cdot\dfrac{1}{100}=\dfrac{1}{100}\)
M=1/2.2/3.3/4.4/5.......99/100 .Cmr 1/15<M<1/110
A = 1+ 1/ 2.2 + 1 / 3.3 +1/ 4.4 + ....+1/99.99 + 1/ 100. 100
2/5<1/2.2+1/3.3+1/4.4+...+1/9.9<8/9
A=1+2.2!+3.3!+4.4!+...+100.100!
1/2.2+1/3.3+1/4.4+....+1/100.100<1
tính : A= 1/2.2+1/3.3+1/4.4+...+1/9.9
B=2/3.3+2/5.5+2/7.7+...+2/2007.2007
C=1/4.4+1/6.6+1/8.8+...+1/2006.2006
E= 1.1+2.2+3.3+...+50.50
F = 1.1+3.3+5.5+...+45.45
G=2.2+4.4+6.6+...+30.30
H=1.1+4.4+7.7+...+100.100
Giải Cụ thể ạ
Em đang cần gấp ạ
bài1 tìm n!:1.2.3......n.tính 1.1!+2.2!+3.3!+4.4!
bài2 tính tổng các số từ 100 đến 999
1.1!+2.2!+3.3!+4.4!+5.5!
A =1.1+ 2.2+ 3.3+ 4.4+ ..... +99.99+ 100.100