-45, x, -35, y, -25, -20, ....
U₁ = -45
U₂ = x
U₃ = -35
U₄ = y
U₅ = -25
U₆ = -20
b = U₆ - U₅
b = -20 - (-25)
b = -20 + 25
b = 5
U₂ = U₁ + b
ㅤ = -45 + 5
ㅤ = -40
Jadi, nilai x adalah -40.
U₄ = U₃ + b
ㅤ = -35 + 5
ㅤ = -30
Jadi, nilai y adalah -30.
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-45, x, -35, y, -25, -20, ....
U₁ = -45
U₂ = x
U₃ = -35
U₄ = y
U₅ = -25
U₆ = -20
b = U₆ - U₅
b = -20 - (-25)
b = -20 + 25
b = 5
U₂ = U₁ + b
ㅤ = -45 + 5
ㅤ = -40
Jadi, nilai x adalah -40.
U₄ = U₃ + b
ㅤ = -35 + 5
ㅤ = -30
Jadi, nilai y adalah -30.