Question

  A= 1/3 + 1/6 + 1/12 + 1/24 + 1/48 + 1 /96 + 1/192 

 

Answer 1

A = 1/3 + 1/6 + 1/12 + 1/24 + 1/48 + 1/96 + 1/192

A x 2 = 2/3 - ( 1/3 + 1/6 + 1/12 + 1/24 +1/48 + 1/96 + 1/192 ) - 1/192

A x 2 = 2/3 - A - 1/92

A x 2 - A = 2/3 - 1/92

A           = bạn tự tính nha mk đang vợi bạn thông cảm cho

Answer 2

1/3 + 1/6+1/12+1/24+1/48+1/96
= 2/3 – 1/3 + 1/3 – 1/6+1/6- 1/12+1/12- 1/24+1/24-1/48+1/48-1/96
=2/3_1/96

= 63/99
= 21/32

Answer 3

= 2x(1/3+1/6+1/12+1/24+1/48+1/96+1/192)

= 2x(1-1/3+1/3-1/6+1/6-1/12+1/12-1/24+1/24-1/48+1/48-1/96+1/96-1/192)

= 2x(1-1/192)

= 2x191/192

=382/192=191/96

Answer 4

= 2x(1/3+1/6+1/12+1/24+1/48+1/96+1/192)

= 2x(1-1/3+1/3-1/6+1/6-1/12+1/12-1/24+1/24-1/48+1/48-1/96+1/96-1/192)

= 2x(1-1/192)

= 2x191/192

=382/192=191/96 

Answer 5

nhân a với 3 ta có 3A=1+1/2+1/4+1/8+1/16+1/32+1/64

             => 3A *2 =2+1+ 1/2+1/4+1/8+1/16+1/32

trừ 6A-3A=> 3A=2-1/64

                  A=127/192

Answer 6

= 2x(1/3+1/6+1/12+1/24+1/48+1/96+1/192)

= 2x(1-1/3+1/3-1/6+1/6-1/12+1/12-1/24+1/24-1/48+1/48-1/96+1/96-1/192)

= 2x(1-1/192)

= 2x191/192

=382/192=191/96 

Answer 7

= 2x(1/3+1/6+1/12+1/24+1/48+1/96+1/192)

= 2x(1-1/3+1/3-1/6+1/6-1/12+1/12-1/24+1/24-1/48+1/48-1/96+1/96-1/192)

= 2x(1-1/192)

= 2x191/192

=382/192=191/96 

Answer 8

= 2x(1/3+1/6+1/12+1/24+1/48+1/96+1/192) = 2x(1-1/3+1/3-1/6+1/6-1/12+1/12-1/24+1/24-1/48+1/48-1/96+1/96-1/192) = 2x(1-1/192) = 2x191/192 =382/192=191/96

Answer 9

= 2x(1/3+1/6+1/12+1/24+1/48+1/96+1/192)

= 2x(1-1/3+1/3-1/6+1/6-1/12+1/12-1/24+1/24-1/48+1/48-1/96+1/96-1/192)

= 2x(1-1/192)

= 2x191/192

=382/192=191/96 

Answer 10

= 2x(1/3+1/6+1/12+1/24+1/48+1/96+1/192)

= 2x(1-1/3+1/3-1/6+1/6-1/12+1/12-1/24+1/24-1/48+1/48-1/96+1/96-1/192)

= 2x(1-1/192)

= 2x191/192

=382/192=191/96 

Answer 11

= 2x(1/3+1/6+1/12+1/24+1/48+1/96+1/192)

= 2x(1-1/3+1/3-1/6+1/6-1/12+1/12-1/24+1/24-1/48+1/48-1/96+1/96-1/192)

= 2x(1-1/192)

= 2x191/192

=382/192=191/96 

Answer 12

=191/96