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Q.

The reciprocal of a negative rational number is:


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a

a positive rational number

b

a negative rational number

c

either a positive or a negative rational number

d

does not exist 

answer is B.

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Detailed Solution

We know that, the reciprocal of a negative rational number is a negative rational number as there is no change in the sign of the number.
Consider an example,
A negative rational be −10 3  , the reciprocal is 3 −10   which is also negative.  Hence, option 2 is correct.
 
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The reciprocal of a negative rational number is: