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1 . log381

A. $4$
B. $27 \sqrt{3}$
C. $8$
D. $\frac{1}{8}$

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Answer: Option C

Explanation:

৩৬ তম বিসিএস প্রিলিমিনারি টেস্ট (08-01-2016)

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2 . log381

A. $4$
B. $6$
C. $9$
D. $8$

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Answer: Option D

Explanation:

১১ তম শিক্ষক নিবন্ধন পরীক্ষা (স্কুল সমপর্যায়-২) (12-12-2014)

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3 . log381=

A. 4
B. $27 \sqrt{3}$
C. 8
D. $\frac{1}{8}$

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Answer: Option C

Explanation:

\log_{\sqrt{3}} 81 = \log_{\sqrt{3}} {(\sqrt{3})}^{2 \times 4} = \log_{\sqrt{3}} {(\sqrt{3})}^{8} = 8 \log_{\sqrt{3}} \sqrt{3} = 8 \times 1 = 8

4 . log381

A. 4
B. 9
C. 3
D. 27

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Answer: Option A

Explanation:

{\log_{3}}^{81} = \log_{3} {(3)}^{4} = 4 {\log_{3}}^{3} = 4 \times 1 = 4