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Question

If `2^(2n - 1) = 1/8^(n - 3)`, then the value of n is :


Options:
A .  3
B .  2
C .  0
D .  - 2
Answer: Option B

`2^(2n - 1) = 1/8^(n - 3)`  `hArr`   `2^(2n - 1)` = `1/(2^3)^(n - 3)` = `(1)/2^(3(n - 3))`  =  `1/2^(3n - 9)`=  `2^(9 - 3n)`

                                         `hArr     2n - 1 =  9 - 3n       hArr      5n    =10        hArr      n = 2`




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