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1., (i) a... {a,b,c} [e, ¤, C, =], (ii) d.. {a,b,c} [e, £, C, =], {a,b,c} [e, £, =, #], (iii) {a,c,b}, (iv) {a,a,b,c} ... {a, b, c} [e, £, =, #], (v) {a} .. {a, b, c} [=, s, e, ɔ], (vi) {a,b, c} ... {a} [= 5, €, #], ....., %3D, 2: (i) e (ii) £ (iii) = (iv)= (v)c (vi)#, 2., A = {1, 2, 3},, в %3D {3, 4, 5} 8 С %3D {5, 6}, %3D, (i) BUC (ii) AUB (iii) AU Ċ (iv) BnC, (v) AOB (vi).AnC(vii) B- C (viii) A – B, (ix) А - С (х) С -В, (хі) В — А (хії) С - А, a : (i) BUC= {3,4,5} U {5,6} = {3,4,5,6}, (ii) AUB= {1,2,3}U {3,4,5} ={1,2,3,4,5}, (iii) AUC= {1,2,3}U {5,6} = {1,2,3,5,6}, (iv) BOC = {3,4,5}n {5,6} = {5}, %3D, %3|