Question

ajutor, va rog
exercitile:11,12,13,1

Answer 1

la 12 poti sa continui tu, după modelul de la 11

Answer 2

Răspuns:

Salut

Ex,11

a+b=7→(a=0;b=7),(a=1,b=6),(a=2;b=5)......(a=7;b=0);

Ex,12

a,b-b,a=1,1; a•b=1;b-a=1;

10b-a=1,→(a-1)-b=1, →a•b=2,

b=a•2; 10b-a=1; 10(a-2)-a=1; 9a=21; a≠N

≠nu apartine inseamna.

(a,b)€∅.(multime vida)

Ex,13

a)1,2+2,3+3,4+4+5,6+6,7+7,8=

3,5+3,4+4+5,6+6,7+7,8=

6,9+4+5,6+6,7+7,8=

10,9+5,6+6,7+7,8=

16,5+6,7+7,8=

23,2+7,8=

31.

b)1,23+2,34+3,45+5,55+6,66+7,77=

3,57+3,45+5,55+6,66+7,77=

7,02+5,55+6,66+7,77=

12,57+6,66+7,77=

19,23+7,77=

27.

Ex,1

a)32,1•10=321

b)62,37•100=6237

c)0,321•1000=321

d)1,468•10000=14680

==evergreen==