Question (9/25)

The value of `log_(-1/3) 81`  is equal to ?

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(A)  -21

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(B)  -4

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(C)  4

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(D)  21

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Question (10/25)

If `log_X Y = 100`  and `log_2 X = 10` , then the value of Y is ?

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(A)  `2^10`

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(B)  `2^100`

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(C)  `2^1000`

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(D)  `2^10000`

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