Question

va implor acuuuuu.mmm!!!!!​

Answer 1

4.
C = ( 2 ^ 40 + 2 ^ 39 + 2 ^ 38 ) : 7
C = ( 2^2+2+1)* 2^38 : 7
C = ( 4+2+1)*2^38 : 7
C = 7 * 2^38 : 7
C = 1 * 2^38
C = 2^38

Answer 2

Răspuns:

Explicație pas cu pas:

4.

c = (2^40 + 2^39 + 2^38) : 7 = 2^38*(2^2 + 2 + 1) : 7 = 2^38*7 : 7 = 2^38 = (2^19)^2 patrat perfect

______________

5.

U(5^129) = 5

U(7^1) = 7

U(7^2) = 9

U(7^3) = 3

U(7^4) = 1

U(7^5) = 7

ultima cifra se repeta din 4 in 4

26 : 4 = 6 rest 2

U(7^29) = 9

U(s) = U(5 + 9) = U(14) = 4

__________

6.

1010110 = 1*2^6 + 1*2^4 + 1*2^2 + 1*2^1 = 64 + 16 + 4 + 2 = 86