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सरल कीजिए: 3-5×10-5×1255-7×6-5 - Mathematics (गणित)

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Question

सरल कीजिए:

`(3^-5 xx 10^-5 xx 125)/(5^-7 xx 6^-5)`

Simplify

Solution

`(3^(-5)xx10^(-5)xx125)/(5^(-7)xx6^(-5))`

`=(3^(-5)xx(2xx5)^5xx5^3)/(5^(-7)xx(2xx3)^(-5))`

`=((3)^(-5)xx(2)^(-5)xx(5)^(-5)xx(5)^3)/((5)^(-7)xx(2)^(-5)xx(3)^(-5))`      ...[∵ (a × b)m = am × bm]

`= 3^(-5-(-5))xx2^(-5-(-5))xx5^(-5+3-(-7))`   ...(am ÷ an = am−n)

= 3× 20 × 5   ...(a0 = 1)

= 55

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Chapter 12: घातांक और घात - प्रश्नावली 12.1 [Page 206]

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NCERT Mathematics [Hindi] Class 8
Chapter 12 घातांक और घात
प्रश्नावली 12.1 | Q 7. (ii) | Page 206
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