bạn xem lại đề bài vs ạ 91/2 hay là 1/2 ạ
bạn ơi bn xem lại gíup mk 91/2 hay 1/2 tớ mới giải đc
1/2+5/6+11/12+19/20+......+89/90
C=1/2+5/6+11/12+19/20+....+89/90 = ?
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+19/20+41/42+55/56+71/72+89/90
Tính : 1/2 + 5/6 + 11/12 + 19/20 + ......... + 71/71 + 89/90
Tính nhanh:
B= 1/2 + 5/6 + 11/12+ 19/20 + 29/30 + 41/42+ 55/56 + 71/72+89/90
A=1/2+5/6+11/12+19/20+29/30+41/42+71/72+89/90
1/2+5/6+11/12+19/20+29/30+41/42+55/56+71/72+89/90
Tính nhanh:
1/2 + 5/6 + 11/12 + 19/20 + 29/30 + 41/42 + 55/56 + 71/72 + 89/90
