GOOWL1. Diketahui : U3 = 15 ⇒ a + 2b = 15 U8 = 35 ⇒ a + 7b = 35 maka : a + 7b = 35 a + 2b = 15 ---------------- - 5b = 20 b = 20/5 b = 4 masukan nilai b : a + 2(4) = 15 a + 8 = 15 a = 15 - 8 a = 7 Jadi, a = 7 dan b = 4 maka : U₂₅ = a + 24b = 7 + 24(4) = 7 + 96 = 103
=96+7=103
U3 = 15 ⇒ a + 2b = 15
U8 = 35 ⇒ a + 7b = 35
maka :
a + 7b = 35
a + 2b = 15
---------------- -
5b = 20
b = 20/5
b = 4
masukan nilai b :
a + 2(4) = 15
a + 8 = 15
a = 15 - 8
a = 7
Jadi, a = 7 dan b = 4
maka :
U₂₅ = a + 24b
= 7 + 24(4)
= 7 + 96
= 103
2. 27² (27⁻²) (x³√729)
= 27x³
Semoga membantu :)