If (a4 - 2a2b2 + b4)x-1 = (a-b)2x (a+b)-2, then x equals to:
Op 1: (a - b) / (a + b)
Op 2: log (a2 - b2)
Op 3: log (a + b) / log (a - b)
Op 4: log (a - b) / log (a + b)
Op 5:
Correct Op : 4
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