SOLUTION :
3 loga (7x^8) - 1/6 loga (5x + 2)
= loga ((7x^8)^3 / (5x + 2)^(1/6))
= loga (343x^24) / (5x + 2)^(1/6)). (ANSWER)
3 loga (7x^8) - 1/6 loga (5x + 2) = 1 = loga (a)
=> loga (343x^24) / (5x + 2)^(1/6)) = loga (a)
= (343x^24) / (5x + 2)^(1/6)) = a (ANSWER).
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