Răspuns:
5. a) 12^24:3^24 = (12:3)^24 {optional = 4^24 =(2^2)^24=2^42}
e) (27:3)^21 = 27^21:3^21
6. a) 2^13×3^13 =(2×3)^13 = 6^13
d) 3^75×4^75×5^75= (3×4×5)^75= 60^75
12. a) 3^x= 3^4×3^3×3^27 => 3^x= 3^4+3+27 => 3^x= 3^24
c) 2^x= [2^5×(2×3)^7] :3^7 => 2^x= 2^5×2^7×3^7:3^7 => 2^x= 2^5+7 ×1=2^12
e) 2^x= (4×8)^15:4^5:2^6 => 2^x= (2^2)^15×(2^3)^15 :(2^2)^5 :2^6 => 2^x= 2^30×2^45:2^10:2^6 = 2^75:2^10:2^6=2^75-10-6=2^59
