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Q = { 2 , 3 ,5 , 7 , 11 , 13 , 17 , 19 }
P - Q = ( 1 , 4 , 6 , 9 , 12 , 18 , 36 )
catatan .
tanda ( - ) itu artinya selisih dua himpunan.
ini soal UN kemarin ya?