Question

ajutatima va rog la ex.3,4,5,si6.

Answer 1

3) A={0;1;2;3;4;5}
    B={1;3;5;7;9}
    AUB = {0;1;2;3;4;5;7;9}
    AU(INTORS)B = {1;3;5}
    A-B={0;2;4}

5) 1+2+3+...+399+400 =
     = 400*401:2 =
     = 200*401 =
     = 80200

6) 2a+b=7
    4a+2b = 2(2a+b) = 2*7 = 14

4) 5*{7+3*[46+6*(27-32:4)]} =
    = 5*{7+3*[46+6*(27-8)]} =
    = 5*[7+3*(46+6*19)] =
    = 5*[7+3*(46+144)] =
    = 5*(7+3*190) =
    = 5*(7+570) =
    = 5*577 =
    = 4039

Sper ca te-am ajutat.