Question

exercițiul 3 .. Multumesc

Answer 1

1-2x > -5
x€ N* => x € { 1,2,3,4,5,...}

Cazul 1: a=1
1-2•1 > -5
-1 > -5 (A)
Cazul 2: a= 2
1-2•2 > -5
-3 > -5 (A)
Cazul 3: a=3
1-2•3 >-5
-6 > -5 (F)
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=> A={1,2}
=> Card(A)= 2