1/2=1-1/2
5/6=1-1/6
11/12=1-1/12
109/110=1-1/110
A=10-(1/2+1/6+...+1/110)
B=(1/2+1/6+...+1/110)=[(1-1/2)+(1/2-1/3)+(1/3-1/4)+...+(1/9-1/10)+(1/10+1/11)
B=1+1/11
A=10-(1+1/11)=10+1/11
tính 1/2 + 5/6 + 11/12 + .....+89/90 + 109/110 + 10/11
Tính:1/2+5/6+11/12+...+89/90+109/110+10/11
1/2+5/6+11/12+..+89/90+109/110+10/11
1/2 +5/6 + 11/12 ... + 89/90 + 109/110 + 10/11
tính giá trị biểu thức sau :
A = 1/2 + 5/6 + 11/12+...+ 89/90+109/110+10/11
1/2+5/6+11/12+...+89/90+109/110+10/11 =?
T=1/2+5/6+11/ 12+...+89/90 +109/110+10/11 = ?
Tính nhanh :
a. 5/6+11/12+19/20+29/30+41/42+55/56+71/72+89/90
b. 1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72+89/90+109/110
GIÚP MK VỚI AI NHANH MK TICK
1\2+5\6+11\12+...+89\90+109\110+10\11