Mulțimilee..............

Explicație pas cu pas:
x=2^n
n<= 4 => n€{0,1,2,3,4} => x€{2⁰,2¹,2²,2³,2⁴} =>
x€{1,2,4,8,16} => A={1,2,4,8,16}
y=x-2
x€A
=> y€{1-2,2-2,4-2,8-2,16-2} => y€{-1,0,2,6,14} cum y€N* =>
y€{2,6,14} =>B={2,6,14}
z=y²-1
y€B
=> z€{2²-1,6²-1,14²-1} => z€{3,35,195} => C={3,35,195}
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