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Simplify and express the result in power notation with positive exponent. (−3)4×(53)4

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Question

Simplify and express the result in power notation with positive exponent.

`(−3)^4 × (5/3)^4`

Simplify
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Solution

`(−3)^4 × (5/3)^4`

= `(-1)^4 xx (3)^4 xx (5)^4/(3)^4`

= `3^4/3^4 xx 5^4`

= `3^(4-4) xx 5^4`

= 30 × 5                            ...`[∵ a^m/a^n = a^(m-n)]`

= 1 ×  54

= (5)4

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Chapter 10: Exponents and Powers - EXERCISE 10.1 [Page 125]

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NCERT Mathematics [English] Class 8
Chapter 10 Exponents and Powers
EXERCISE 10.1 | Q 2. (iii) | Page 125

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