No.3 (union/gabungan himpunan)

a. A U B = {1, 2, 3, 4, 5, 6, 7, 8}

b. A U C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

c. B U C = {1, 2, 3, 4, 8, 9, 10}

d. A U B U C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

e. n(A U B) = 8

f. n (A U B U C) = 10

No.4 (selisih himpunan)

a. A - B = {1, 2, 3, 9}

b. A - C = {1, 2, 3, 4}

c. B - C = {4, 6, 7, 8}

d. B - A = {6, 7, 8, 10}

e. C - B = {9, 11, 12}

f. C - A = {10, 11, 12}

No.5 (komplemen himpunan)

S = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 }

a. A = {1, 2, 3, 4, 5}

A' = { 0, 6, 7, 8, 9, 10, 11, 12}

b. A = {1, 3, 5, 7, 9}

A' = { 0, 2, 4, 6, 8, 10, 11, 12}

c. A = {2, 3, 5, 7, 11}

A' = { 0, 1, 4, 6, 8, 9, 10, 12}

d. A = {2 ≤ x ≤ 12, x € A}

= {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}

A' = {0, 1}

e. A = {x < 3 atau x ≥ 8, x € A}

= {4, 5, 6, 7, 8}

A' = {0, 1, 2, 3, 9, 10, 11, 12}

#maaf jika ada yg salah ya