log(2) 16 = log(2) 2^4 = 4
log(3) 3 = 1
непонятно
log(5) 1 = 0
5. log(x) 36 = 2 x>0
x^2=36
x=6
6. log(3) 81 = log(3) 3^3 = 3
7. log(12) 2 + log(12) 72 = log(12) 2*72 = log(12) 12^2 = 2
8, log(5) 75 - log(5) 3 = log(5) 75/3 = log(5) 5^2 = 2
9, log(a) b + log(a) c = log(a) b*c
10. y=log(2) (x-1)
x-1>0
x>1
x∈(1 +∞)
11. log(2) x = -2 x>0
2^-2 = x
x=1/2^2 = 1/4
К) 400(50×80)
О)200 (200:200 и 200:40)
В)24 (24:6 и 24:8)
Ж) 120 (120:30 и 120:40)
Л)60 (60:60 и 60:15)
П)34 (34:17 и 34:34)
Г)18 (18:6 и 18:9)
З)150 (150:30 и 150:50)
М)120 (120:24 и 120:120)
Р)1000 (1000:40 и 1000:25)
В 1 центнере 100кг. 100:5*1=20 (кг)
Х+32+у+13=х+у+32+13=х+у+45