Cho A = 1/51 + 1/52+ 1/53 +...+ 1/100
B = 1/1.2 + 1/3.4 +1/5.6+...+ 1/99.100
A/ B = ?
tinh: ( 1/52+ 1/51+ 1/53 + ...+ 1/100) : ( 1/1.2 + 1/3.4 + 1/5.6 + .... + 1/99.100 )
tinh: ( 1/52+ 1/51+ 1/53 + ...+ 1/100) : ( 1/1.2 + 1/3.4 + 1/5.6 + .... + 1/99.100 )
Cho A = 1/51 + 1/52+ 1/53 +...+ 1/100
B = 1/1.2 + 1/3.4 +1/5.6+...+ 1/99.100
A/ B = ? (chi tiết nha)
CHỨNG MINH:1/1.2+1/3.4+1/5.6+1/7.8+.......+1/99.100=1/51+1/52+1/53+......+1/100
Cho A = 1/1.2+1/3.4+1/5.6+...+1/99.100
a Chứng minh A= 1/51+1/52+1/53+...+1/100
b Chứng minh 7/12<A<5/6
tính B:C biết
B=1/51+1/52+1/53+...+1/100
C= 1/1.2+1/3.4+1/5.6+...+1/99.100
A = 1/51 +1/52 + 1/53 + ... + 1/100
B = 1/1.2 + 1/3.4 + 1/4.5 + ... + 1/99.100
CMR A : B = 1
Làm mà t thấy hợp lí cho tick
tính tỉ số A+1/51+1/52+...+1/100,B= 1/1.2+1/3.4+..+1/99.100