Question

Nếu A=1³+2³+...+100³ và B=2³+4³+...+200³  thì B/A=

 

Answer 1

A=1^3+2^3+..+100^3

B=2.(1^3+2^3+.........+100^3)

B/A=2 nhé Mình cũng ko chắc nữa!!!!!

Answer 2

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

Answer 3

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

Answer 4

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

Answer 5

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