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trangsaodo97


chung minh rang A>B
A=1+5+5^2+...............+5^9:1+5+5^2+.................+5^8
B=1+3+3^2+..........+3^9:1+3+3^2+..............+3^8
giup to nha
thank you
A=1+5+5^2+...............+5^9:1+5+5^2+.................+5^8
B=1+3+3^2+..........+3^9:1+3+3^2+..............+3^8
giup to nha
thank you