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how did you the exponent value as 4.5. As according to book, the answer of -3/x should be 0.50 but with your explanation and value the answer comes to be 0.66.
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1 Answer

the 4 went into the 512 4 times. leaving a 2 or 1/2 left. therefore 4.5
by Level 10 User (55.7k points)

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