+ 14+ 12+ 1A = 1 - 11024 ⇒ A = 10231024B) B = 1 + 19 + 127 +

512

-

1

2

+

1

8

+ ...+

1

4

+

1

2

+

1

A = 1 -

1

1024

A =

1023

1024

b) B = 1 +

1

9

+

1

27

+ ....+

1

243

+

1

729

3

+

1

3 x B = 3 + 1 +

1

243

2 x B = 3 x B – B = 3 + 1 +

1

27

+ ....+

1