1. 19 24-29 , 2015, , Language: , 26 2015 1. a, b, c k a2 + b2
+ 16c2 = 9k2 + 1 2. a, b, c, a + b + c = 3. A = 2 a3 a + 2 b3 b + 2
c3 c 3. ABC. 1 2 AB A B, . M AB AC BC 1 2 E F, . D EF MC, ADB = EMF
4. L-. 5 5 , 25 , - k 25 L- . , A B, : A, , k . L- L- . B L- - 3 .
k B . : 4 30 10
