Find the value of x which satisfies the following equation
4 log7 (x - 8) = log3 81
Explanation:
4 log7(x – 8) = log3 81
∴ 4 log7(x – 8) = log3(34) = 4
∴ log7(x – 8) = 1
∴ x – 8 = 7 i.e. x = 15
Hence, option (d).
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