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U₁₂ = 34
Un = a + ( n - 1 ) b a + 5b = 10
U₆ = a + 5b = 10 a + 5(4) = 10
U₁₂ = a + 11b = 34 - a + 20 = 10
-6b = -24 a = 10 - 20
b = -24/-6 = -10
= 4
U₂₄ = -10 + 23(4)
= -10 + 92
= 82
U12 = 34 _
- 6 = - 24
b = 4
*Tambahan =
U1 = -10
U2 = -6
U3 = -2
U4 = 2
U5 = 6
U6 = 10*
Un = a + ( n - 1 ) x b
U24 = -10 + (24 - 1) x 4
= -10 + (23) x 4
= -10 + 92
= 82