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2× = y
Gunakan rumus abc
(y₁, y₂)
sederhanakan bentuk akar
Cari nilai x
2× = -1 + √2
x = ²log (-1 + √2)
dan
2× = -1 - √2
x = ²log (-1-√2) ---> tidak memenuhi karena (-1 - √2) bernilai negatif
Jawaban : E