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A={2^0; 2^0+2^1; 2^0+2^1+2^2; 2^0+2^1+2^2+2^3;...}
B={3^0; 3^0+3^1; 3^0+3^1+3^2; 3^0+3^1+3^2+3^3;...}
Determinati multimea A intersectat cu B.


Răspuns :

A={2^0; 2^0+2^1; 2^0+2^1+2^2; 2^0+2^1+2^2+2^3;...}={1,3,7,15,31,63....}
B={3^0; 3^0+3^1; 3^0+3^1+3^2; 3^0+3^1+3^2+3^3;...}={1,4,13,40,121....}
A intersectat cu B={1}