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Say true or false and justify your answer: 10 × 1011 = 10011

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Question

Say true or false and justify your answer:

10 × 1011 = 10011

Options

  • True

  • False

MCQ
True or False
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Solution

This statement is False.

Explanation:

10 × 1011 = 10011

L.H.S. = 10 × 1011 

= `10^(11  +  1)`       ...(∵ am × an = am + n)

= 1012

R.H.S. = 10011

= (10 × 10)11

= (102)11

= `10^(2  ×  11)`

= 1022        ...(∵ (am)n = amn)

As L.H.S. ≠ R.H.S.

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Chapter 11: Exponents and Powers - EXERCISE 11.2 [Page 181]

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NCERT Mathematics [English] Class 7
Chapter 11 Exponents and Powers
EXERCISE 11.2 | Q 3. (i) | Page 181

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