Find the Unknown Value $\log _ { 9 } \frac { 1 } { 81 } = y$

question 118

Multiple Choice

Find the unknown value.
- $\log _ { 9 } \frac { 1 } { 81 } = y$

• A)-2
• B)9
• C)-9
• D)2

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Definitions:

Pharmacodynamic

pertains to the study of the biochemical and physiological effects of drugs and their mechanisms of action.

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