Question

- faceti de la ex 2 punctul d si f

- faceti de la ex 3 punctul a

Dau coroana

Answer 1

notez  cu > „la putere”

2d
(2>24+2>23+2>22)=2>22(2>2+2+1)=2>22*7care se imparte la 7
2>22*7:7=2>22
2f
2>(n+2)+2>(n+3)+2>(n+1)=2>(n+1)*(2+2>2+1)=7*2>(n+1)


3a
aplic formula Gauss 1+2+3+....+n=n x ( n + 1 ) : 2

1+2+3+....+145= 145*146:2=145*73=10585

Sper ca te-am ajutat, ms

Answer 2

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