Let `a, b, c > 0` such that `a>b>c and a+c> 2b.` If `In(a + c) + In(a - 2b + c) = 2 In(a -c),` then which of the following relation is(are) correct?

Let `a, b, c > 0` such that `a>b>c and a+c> 2b.` If `In(a + c) + In(a - 2b + c) = 2 In(a -c),` then which of the following relation is(are) correct?
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Answer :

Let `a, b, c > 0` such that `a>b>c and a+c> 2b.` If `In(a + c) + In(a - 2b + c) = 2 In(a -c),` then ... = (b-c)/(a-b)` D. `b^(2) = a^(2) +c^(2)`
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