Give simplified form of \(\rm \frac{a^{10}\times b^{-7} \times c^{-4}}{a^{-5}\times b^2\times c^5}\).

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RRB Group D 30 Aug 2022 Shift 3 Official Paper
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  1. a15 × b-9 × c-9
  2. a15 × b9 × c9
  3. a5 × b9 × c-9
  4. a5 × b-9 × c-9

Answer (Detailed Solution Below)

Option 1 : a15 × b-9 × c-9
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Detailed Solution

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Concept used:

If base is same then ,

tn/t1 = tn-1  

Where t is any variable 

Calculation:

Here, we have \(a^{10} \times b^{-7} \times c^{-4}\over a^{-5} \times b^2 \times c^5\) 

⇒ a10 -(-5) × b-7-2 × c-4-5  [ As tn/t1 = tn-1

⇒ a15 × b-9 × c-9 

Hence, the required value is a15 × b-9 × c-9.

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