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ichabella2010
20.09.2019 •
Mathematics
1) aflati suma divizorilor numarului 18. dar suma divizorilor numarului 81 ?
exercitiul 2) scrieti primii 5 multipli ai numerelor 8,18,21,35,64 si 111.
exercitiul 3) stabiliti valoarea de adevar a propozitiilor :
a)17: 17 b)6|48 c)72: 9 d)110 e)12|144 f) 2^2 | 4^3 g)125: 25 h)144: 12 i)121: 11 j)10^|200 k)10 | 7(4^2-2x3) l)436: 12 m)8|14 n)4: 4 o)4: 3 p)15|315 q)19|190 r) (6^2x5-2^2x10) : (3^2+1^569-0^368) s)6^2 | (4^3+ 2x15-2x5^2) t) 6 : (2^5x5)
exercitiul 3) scrieti divizorii numerelor 10,30 si 45 . precizati care sunt divizorii propii si care sunt divizorii impropii ai fiecarui numar.
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Ответ:
suma e 1+2+3+6+9+18= 39
D81∈{1,3,9,27,81}
suma e 1+3+9+27+81=121
2. M8∈{0,8,16,24,32}
M18∈{0,18,36,54,72}
M21∈{0,21,42,63,84}
M35∈{0,35,70,105,140...}
M64∈ {0,64,128,192,256...}
M111∈ {0,111,222,333,444}
3. a) A, b) A , c) A, la d) nu e complet, e) A, f) A, g) A, h) A, i) A, k) 10 | 7*10 A, l) F, m) F, n) A, o) F, p) A, q) A, r) (36*5-40) divizibil cu 10, (180-40)=140 divizibil cu 10, A, s) 36| (64+30-50), 36 | 44 F, 60.000 divizibil cu 160
Ответ: