1, Cho A = 1/ 1.300 + 1/2.301 + 1/3.302 + ... + 1/101.400
B = 1/1.102 + 1/2.103 + 1/3.104 + ... + 1/299.400
Tính A chia B
2, CMR : 2/5 < 1/2^2 + 1/3^2 + ... + 1/9^2 < 8/9
tính A/B trong trường hợp sau:
a)A=1/1.300+1/2.301+1/3.302+...+1/101.400
B=1/1.102+1/2.103+1/3.104+...+1/299.400
b)A=1/2+1/3+1/4+...+1/200
B=1/199+2/198+...+198/2+199/1
tính A/B biết rằng
A= 1/(1.300)+1/(2.301)+...+1/(101.400)
B=1/(1.102)+1/(2.103)+1/(3.104)+...+1/(299.400)
Tính A/B :
A= 1/1.300+1/2.301+1/3.302+...+1/101.400
B= 1/1.102+1/2.103+1/3.104+...+1/299.400
Tính A/B biết :
A = 1/1.300 + 1/2.301 + 1/3.302 + ... + 1/101.400
B = 1/1.102 + 1/2.103 + 1/3.104 + ...+ 1/299.400
tính a /b biết
A= 1/1.300+1/2.301+1/3.2012+..+1/101.400
B=1/1.102+1/2.103+1/3.104+...+1/299.400
Tính A/B, biết rằng:
A=1/1.300+1/2.301+1/3.302+...+1/101.404
B=1/1.102+1/2.103+1/3.104+..+1/299.400
Tính A/B, biết rằng:
A=1/1.300+1/2.301+1/3.302+...+1/101.404
B=1/1.102+1/2.103+1/3.104+..+1/299.400
tính a /b biết
A= 1/1.300+1/2.301+1/3.2012+..+1/101.400
B=1/1.102+1/2.103+1/3.104+...+1/299.400