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Whether every rational number (except 0)...

Whether every rational number (except 0) has a multiplicative inverse? Is is true in the case of an integers (except 0)?

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ASHOK PUBLICATION ASSAM-Rational Numbers-EXAMPLE
  1. Is the set of natural numbers N closed under the operation subtraction...

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  2. Is there any additive inverse element of a natural number? What about ...

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  3. Whether every rational number (except 0) has a multiplicative inverse?...

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  4. Which element in the set of rational numbers is called multiplicative ...

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  5. Use the symbols <, =, > appropriately in place of "?" 4 ? 3'

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  6. Use the symbols <, =, > appropriately in place of "?" 3?4

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  7. Use the symbols <, =, > appropriately in place of "?" -3?-1

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  8. Use the symbols <, =, > appropriately in place of "?" -2?0

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  9. Use the symbols <, =, > appropriately in place of "?" -9+ 1?(-2)xx4

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  10. Use the symbols <, =, > appropriately in place of "?" -frac(1)(2)? -...

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  11. Use the symbols <, =, > appropriately in place of "?" -2(5+1)?(-4)xx...

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  12. Use the symbols <, =, > appropriately in place of "?" -3?0

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  13. Show that 3 + 4 + 5 = 5 + 4 + 3

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  14. Show that a + b + c = b + c + a

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  15. Show that a + b + c = c + a + b

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  16. Show that 7 xx 5 xx 2 = 5 xx 2 xx 7

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  17. What is the additive inverse of the following real number? 3

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  18. What is the additive inverse of the following real number? 3/4

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  19. What is the additive inverse of the following real number? 0

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  20. What is the additive inverse of the following real number? sqrt2

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