A=1^3+2^3+..+100^3
B=2.(1^3+2^3+.........+100^3)
B/A=2 nhé Mình cũng ko chắc nữa!!!!!
B=23+43+....+2003
B=(1.2)3+(2.2)3+.....+(2.100)3
B=13.23+23.23+....+23.1003
B=23.(13+23+.....+1003)=8.A
=>B/A=8A/8=8
B=23+43+...+2003
B=(1.2)3+(2.2)3+...+(2.100)3
B=13.23+23.23+...+23.1003
=>B=23.(13+23+...+1003)
mà A=(13+23+...+1003)
=>B=8
=>B=8A
=>B:A=8
=>B/A=8
B=23+43+...+2003
B=(1.2)3+(2.2)3+...+(2.100)3
B=13.23+23.23+...+23.1003
=>B=23.(13+23+...+1003)
mà A=(13+23+...+1003)
=>B=8
=>B=8A
=>B:A=8
=>B/A=8
B=23+43+....+2003
B=(1.2)3+(2.2)3+.....+(2.100)3
B=13.23+23.23+....+23.1003
B=23.(13+23+.....+1003)=8.A
=>B/A=8A/8=8
