IvanaA
A + (a +b) + a + 2b = 30 a + 10 + a + 2b = 30 2a + 2b = 30 -10 2a + 2b = 20 a + b = 10 b = 10 - a
a(a +b) (a +2b) = 910 a ( a + 2b) = 910/10 a ( a + 2(10-a) = 91 a ( a + 20 - 2a) = 91 a ( 20 - a) = 91 20a - a^2 = 91 a^2 - 20a + 91 = 0 ( a - 7 ) ( a - 13) a = 7 atau a = 13 deret tersebut .... 7, 10, 13 atau 13,10,7 bilangan terkecil = 7
7 + 10 + 13 = 30
7 × 10 × 13 = 910
Jadi, nilai bilangan terkecil adalah 7.
a + 10 + a + 2b = 30
2a + 2b = 30 -10
2a + 2b = 20
a + b = 10
b = 10 - a
a(a +b) (a +2b) = 910
a ( a + 2b) = 910/10
a ( a + 2(10-a) = 91
a ( a + 20 - 2a) = 91
a ( 20 - a) = 91
20a - a^2 = 91
a^2 - 20a + 91 = 0
( a - 7 ) ( a - 13)
a = 7 atau a = 13
deret tersebut .... 7, 10, 13 atau 13,10,7
bilangan terkecil = 7