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Logarithm
If logx ❨ 9 ❩ = - 1 , then x is equal to: 16 2
- 3 4
3 4
81 256
256 81
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Correct Answer:
256 81
Explanation:
log
x
❨
9
❩
= -
1
16
2
⟹
x
-1/2
=
9
16
⟹
1
=
9
√
x
16
⟹ √
x
=
16
9
⟹
x
=
❨
16
❩
2
9
⟹
x
=
256
81
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