а) 1/2; 2/3; 3/4; 4/5; 5/6; ...
an=n/(n+1); n∈N
б) 3/10; 9/100; 27/1000; 81/10000;...
an=3ⁿ/10ⁿ ; n∈Z ; или так an=(3/10)ⁿ ; n∈N
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а) 1/2; 2/3; 3/4; 4/5; 5/6; ...
an=n/(n+1); n∈N
б) 3/10; 9/100; 27/1000; 81/10000;...
an=3ⁿ/10ⁿ ; n∈Z ; или так an=(3/10)ⁿ ; n∈N