Các câu hỏi tương tự
cho M = \(\frac{2}{3}+\frac{5}{6}+\frac{9}{10}+...+\frac{4949}{4950}\).Chung minh 97<M<98
Tính B = 1 + 2+ 3+ ...+ 98+99
B = 1 + (2 + 3 + 4+...+ 98 + 99). Ta thấy tổng trong ngoặc gồm 98 số hạng, nếu chia thành các cặp ta có 49 cặp nên tổng đó là:
(2 + 99) + (3 + 98) +..+ (51 + 50) = 49.101 = 4949 khi đó B = 1 + 4949 = 4950
\(A=\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+...+\frac{9901}{9900}\)
\(B=\frac{2}{3}+\frac{5}{6}+\frac{9}{10}+\frac{14}{15}+...+\frac{4949}{4950}\)
2/3.5/6.9/10.14/15...189/190 bằng mấy
F=1.3+2.4+3.5+...+2013.2015
J=6+16+30+...+19600+19998
K=2+5+9+14+...+4949+5049
Tính Tổng Của Từng Kết Qủa
M=1.3+2.4+3.5+...99.101
Hãy viết cong thuc tổng quát của m
A=1.4+2.5+3.6+...+99.102
B=1+3+6+10+...+4851+4950
C=6+16+30+48+...+19600+19998
Tính: A= 1.3+2.4+3.5+....+ 99.101
B= 1.4+2.5+3.6+....+99.102
C= 4+12+24+40+...+19800
D= 1+3+6+10+...+4851+4950
A1.2+2.3+3.4+...............+98.99+99.100B1.3+2.4+3.5+...............+99.101C1.4+2.5+ 3.6+..............+99.102D4+12+24+40+..............+1904+19800E1+3+6+10+.................+4851+4950F6+16+30+48+..............+19600+19998G2+5+9+14+.................+4949+5049H1.2.3+2.3.4+...............+98.99.100I12+22+32+...................+992+1002K22+42+62+......................+982+1002L12+32+52+.......................+972+992M12-22+32-42+....................+992-1002N1.22+2.32+3.42+...............+98.992P1...
Đọc tiếp
A=1.2+2.3+3.4+...............+98.99+99.100
B=1.3+2.4+3.5+...............+99.101
C=1.4+2.5+ 3.6+..............+99.102
D=4+12+24+40+..............+1904+19800
E=1+3+6+10+.................+4851+4950
F=6+16+30+48+..............+19600+19998
G=2+5+9+14+.................+4949+5049
H=1.2.3+2.3.4+...............+98.99.100
I=12+22+32+...................+992+1002
K=22+42+62+......................+982+1002
L=12+32+52+.......................+972+992
M=12-22+32-42+....................+992-1002
N=1.22+2.32+3.42+...............+98.992
P=1.3+3.5+5.7+................+97.99+99.101
Q=2.4+4.6+6.8+................+98.100+100.102
R=13+23+33+43+.....................+993+1003
rút gọn phân số
6.9-2.17/63.3-119
2.3+4.6+14.21/3.5+6.10+21.35
3.13-13.18/15.40-80