+ = 10
9 + = 10
=
=
2
=
2
= 9
=
+ = 18
+ 3 = 18
=
+ + + = 15 + 9 + 3 + 1 = 28
Jawaban: A
3. Potongan tali tersebut mengikuti barisan geometri
Paling pendek : = 4
1
Paling Panjang = 512
8
Panjang tali semula + + + ⋯ … . . +
3
8
1
2
= 512
8
7
. = 512
7
4. = 512
7
= 512/4
7
= 128
7
= 27
= 2
28