a)
A....M₁....M₂............M₃.......................M₆.......... .............................B
AM₁=M₁M₂=a
AM₂=M₂M₃=2a
AM₃=M₃M₄=4a
AM₄=M₄M₅=8a
AM₅=M₅M₆=16a
AM₆=M₆M₇=32a
AM₇=M₇M₈=64a
AM₈=M₈M₉=128a
AM₉=M₉M₁₀=256a ⇒ 4×64a=256a deci 4M₇M₈=M₉M₁₀
b)
observam
AM₁=M₁M₂=a = 2°×a deci indicele lui M este puterea lui 2 +1
MnB=1024a
MnB=2¹⁰×a
n= 10+1=11
M₁₁B=1024a