Respostas

2013-08-11T10:19:04-03:00
1)Ache o conjunto das partes de A,A={1,2,3,4,5,6,7,8}.

¡São 256 conjuntos...! Escrevo alguns:

P(A) = {{}, {1}, {2}, {3}, ... {8}, 
{1,2}, {1,3}, {1,4}, ...{1,8}, {2,3}, {2,4}, ..., {2,8}, {3,4}, {3,5},..., {3,8}, ... {7,8}, 
{1,2,3}, {1,2,4}...{1,2,8}, {2,3, 4}, {2,3,5},..., {2,7,8}, .., {6,7,8}, 
{1,2,3,4}, {1,2,3,5}, ..., {1,2,3,8}, {1,3,4,5}, ..., {5,6,7,8}
{1,2,3,4,5}, {1,2,3,4,6},{1,2,3,4,7}, {1,2,3,4,8}, {1,2,3,5,6},..., {4,5,6,7,8}
{1,2,3,4,5,6}, (1,2,3,4,5,7),...
{1,2,3,4,5,6,7},...
{1,2,3,4,5,6,7,8}

2)Dados A={1,2,3} e B={a,b},ache:

AxB = { (1,a), (1,b), (2,a), (2,b), (3,a), (3,b)}
BxA = { (a,1), (b,1), (a,2), (b,2), (a,3), (b,3)}
BxB = {(a,a), (a,b), (b,a), (b,b)}

3) Dados A={1,2} e B={x,y,z},ache A x B x C .
Se C fosse, por exemplo, {y, z}

AxBxC = { (1,a,y), (1,b,y), (2,a,y), (2,b,y), (3,a,y), (3,b,y), (1,a,z), (1,b,z), (2,a,z), (2,b,z), (3,a,z), (3,b,z)} 
 um exemplo e assim vc faz com o seu 
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