yg bisa jwb bwt bsk plss

a.{a,b,c,d}
b.{f,g,h,j}
c.{e,f}
d.{a,b,c,d,f,g,h,j}

4.
a. {a, b, c, d, e, f} - {e, f, g, h, j} = {a, b, c, d}
b. {e, f, g, h, j} - {a, b, c, d, e, f} = {g, h, j}
c. perhatikan hasil dari bagian a ({a, b, c, d}). {a, b, c, d} ∩ {a, b, c, d, e, f} = {a, b, c, d} (hasil yg sama dengan bagian a)
d. {a, b, c, d} ∪ {g, h, j} = {a, b, c, d, g, h, j}