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	21/02 20:38:17
	Toán học - Lớp 9 \| Toán học \| Lớp 9

Tính A/B bt: A=1/1.300+1/2.301+1/3.302+...+1/101.400 B=1/1.102+3/2.103+1/3.104+...+1/299.400 Chứng minh rằng: 100-(1+1/2+1/3+1/4+...+1/100)=1/2+2/3+3/4+...+99/100 Tính A/B bt A=1/2+1/3=1/4+...1/200 B=1/199+2/198+3/197+...+198/2+199/1

Tính A/B bt:
A=1/1.300+1/2.301+1/3.302+...+1/101.400
B=1/1.102+3/2.103+1/3.104+...+1/299.400
Chứng minh rằng:
100-(1+1/2+1/3+1/4+...+1/100)=1/2+2/3+3/4+...+99/100
Tính A/B bt
A=1/2+1/3=1/4+...1/200
B=1/199+2/198+3/197+...+198/2+199/1