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Evaluate the following: (64)^(−3/2) - Mathematics

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Question

Evaluate the following:

`(64)^(-3/2)`

Evaluate
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Solution

Given: `(64)^(-3/2)`

Step-wise calculation:

1. Write 64 as a power of 2:

64 = 26

2. Substitute in the expression:

`(64)^(-3/2) = (2^6)^(-3/2)`

3. Use the power of a power property (am)n = am × n:

`(2^6)^(-3/2) = 2^(6 xx (-3/2))`

`(2^6)^(-3/2) = 2^-9`

4. Convert negative exponent to reciprocal:

`2^-9 = 1/2^9`

5. Calculate (29):

29 = 512

So, `(64)^(-3/2) = 1/(512)`.

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Chapter 6: Indices/Exponents - Exercise 6B [Page 131]

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Nootan Mathematics [English] Class 9 ICSE
Chapter 6 Indices/Exponents
Exercise 6B | Q 1. (ii) | Page 131
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