1. Dik : A= {x/x<10, x∈ Bil. asli} B= {x/2 ≤ x <10, x∈ bilangan prima} maka A - B ?
2. suatu fungsi ditentukan dengan rumus f(x)=ax+b. jika f(3)=1 dan f(-2)= -9, maka nilai a dan b adalah?
tolong dibantu ya, thanks.
retno30
1. A =(0,1,2,3,4,5,6,,7,8,9) B = (2,3,5,7) A-B = (0,1,6,8,9) 2. 3a + b = 1 -2a + b = -9 5a = 10 (eliminasi) a = 2 3a + b = 1 3(2) + b = 1 6 + b =1 b = -5
B = (2,3,5,7)
A-B = (0,1,6,8,9)
2. 3a + b = 1
-2a + b = -9
5a = 10 (eliminasi)
a = 2
3a + b = 1
3(2) + b = 1
6 + b =1
b = -5