Jawabanmu

2014-01-16T18:42:53+07:00
A. ada 10
(2,3)(2,5)(2,7)(2,11)(3,5)(3,7)(3,11)(5,7)(5,11)(7,11)
anggap kurung ( ) di atas mewakili { }

b. ada 10
(2,3,5)(2,3,7)(2,3,11)(2,5,7)(2,5,11)(2,7,11)(3,5,7)(3,5,11)(3,7,11)(5,7,11)

c. ada 5
(2,3,5,7)(2,3,5,11)(2,3,7,11)(2,5,7,11)(3,5,7,11)
21 3 21