a) A={n/n litera a cuvantului ,''PICOR"}
A={p,i,c,o,r}
b) B={n+5, n∈N, 1≤n≤501}
B={1,6,11,16,21,26,31,36,41,46,51,56,61,66,71,76,81,86,91,96,101,106,111,116,121,126,131,136,141,146,151,156,161,166,171,176,181,186,191,196,201,206,211,216,221,226,231,236,241,246........446,451,456,461,466,471,476,481,486,491,496,501}
g) G={[tex] 2^{n} [/tex], n∈N, 0≤n≤5}
G={1,2,4,8,16,32}
h) H={n², n∈N, 0≤n≤6}
H={0,1,4,9,16,25,36}
