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Question

Compute:

`(243)^(2/5)÷(32)^(-2/5)`

Sum

Solution

`(243)^(2/5)÷(32)^(-2/5)`

`=(3xx3xx3xx3xx3)^(2/5)÷(2xx2xx2xx2xx2)^(-2/5)`

`=(3^5)^(2/5)÷(2^5)^(-2/5)`

`=3^(5xx2/5)÷2^(-2/5xx5)=3^2÷2^-2`

`=3^2xx1/2^-2=3^2xx2^(+2)`

`=3xx3xx2xx2=36`

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More About Exponents
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Chapter 2: Exponents - Exercise 2 (B) [Page 33]

APPEARS IN

Selina Concise Mathematics [English] Class 8 ICSE
Chapter 2 Exponents
Exercise 2 (B) | Q 1.14 | Page 33
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