Find x, if log₈₁: 9 = x?
- 0.5
- 3
- 1.5
- None of these
Explanation
Given:
log₈₁ 9 = x
We can rewrite this in exponential form:
81^x = 9
Since 81 = 9², we can rewrite:
(9²)^x = 9
9^(2x) = 9¹
Equating the exponents:
2x = 1
x = 1/2
x = 0.5
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