Răspunsuri

2014-05-01T15:54:05+03:00
A={ x∈Z | 1/2x-1 ∈Z} - 64588. ... 2x-1|15 => 2x-1={1,3,5,15,-1,-3,-5,-15} 2x={2,4,16,0,-2,-4,-14}=>x={1,2,8,0,-1,-2,-7}=A

Sper ca iti este de folos


2014-05-01T17:12:21+03:00
A={ x∈Z | 1/2x-1 ∈Z} - 64588. ... 2x-1|15 => 2x-1={1,3,5,15,-1,-3,-5,-15} 2x={2,4,16,0,-2,-4,-14}=>x={1,2,8,0,-1,-2,-7}=A