1) Letra A, B e C correspondem a uma função de A em B.

2a) D(F)= {1, 2, 3, 4} | Img(F)= {3, 6, 11, 17} | CD(F)= {3,6, 11, 17, 19}
2b) D(F)= {-3, -2, -1, 0, 1} | Img(F)= {-2, 0, 2, 4, 6} | CD(F)= {-2, 0, 2, 4, 6, 8, 10}
2c) D(F)= {1, 3, 5, 7} | Img(F)= {6} | CD(F)= {4, 6, 8, 10}
2d) D(F)= {-2, -1, 0, 1, 2} | Img(F)= {-3, 0, 1, 3} | CD(F)= {-3, 0, 1, 3, 8}

3a) S(9)  = 7 * 180 | S(9)  = 1260
3b) S(11) = 9 * 180 | S(11) = 1620
3c) S(16) = 14 * 180| S(16) = 2520
3d) S(34) = 32 * 180| S(34) = 5760

4a) D(F) = {5} Img(F)= {9}
4b) D(F) = {R} Img(F)= {10}
4c) D(F) = {2, 6} Img(F)= {4, 12}
4d) D(F) = {4} Img(F)= {20}

6a)3x-2 ≥ 0 | 3x = 2 |X = 2/3 | {XER|X>2/3}
6b)√3x-6 | √3x-6≥ 0 | 3x ≥ 6 | X = 6/3 | {XER|X≥6/3}
6c)√x-6 | √x-6≥ 0 | x ≥ 6 | x = 6 | {XER|X≥6}
6d)3x-4 |3x-4≠ 0 | 3x ≠ 4 | x ≠ 4/3 | {XER|x≠4/3}