Matematică
zadareni
2015-11-21 15:20:15
Vă rog,am nevoie acuuuuummmmm!!!!!!!
Răspunsuri la întrebare
bib2002
2015-11-21 21:20:31

12) a. 8^3 b.13^1+13=13+13=26 c.7^3-7^2=343-49=294 d.7^4-7^3+1=7×(4+3)+1=7×7+1=50 e.15^22:15^20-15^0=15^2-1=224 f.3^2×9^18:27^6=3^2×(3^2)^18 (aici este 2 la a 2 totul la 18):27^6=3^2×3^36:(3^3)^6=3^2×3^36:3^18=3^38:3^18=3^20

lumidumitru
2015-11-21 21:21:46

13) a) (2^4)^7 - 2^28 = 2^28 - 2^28 = 0 b) (3^5)^4 : 3^19 = 3^20 : 3^19 = 3 d) (5^8)^7 : (5^53 ×5) = = 5^56 : 5^54 = = 5^2 = 25 e) (7^7)^7 : (7^77:7^7×5) = = 7^49 : (7^77:7^35) = = 7^49 : 7^42 = = 7^7 f) (13^8)^13 : (13^26)^4 = = 13^104 : 13^104 = = 1 g) 7^169 : 7^168 = 7 h) 2^49 : 2^48 = 2 i) 3^64 : 3^64 = 1 14) b) 3^20 × 2^20 -6^23 : 6^3 = = (3×2)^20 - 6^20 = = 6^20 -6^20 = = 0 c) 2^18 × 12^18 : (6^16 × 4^16) = = (2×12)^18 : (6×4)^16 = = 24^18 : 24 ^16 = = 24^2 = = 576 d) 75^38 : 25^38 -(3^19)^2 = = (75:25)^38 - 3^38 = = 3^38 - 3^38 = = 0 e)26^27 : 13^27 : 2^25 = = (26:13)^27 : 2^25 = = 2^27 : 2^25 = = 2^2 = = 4 f) 10^64 : 2^64 - 5^64 = = (10:2)^64 - 5^64 = = 5^64 -5^64 = = 0

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