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Q.

1-20092010=

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a

20092010

b

12010

c

-12010

d

-20092010

answer is A.

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Detailed Solution

1-20092010

11-20092010

The L.C.M of 1,2010=1×2010

                                                     =2010

2010-20092010

=12010

Option (A) is correct

Option (C):20092010

2009201012010

Option (C) is incorrect 

Option (B) : -12010

The additive inverse of  12010 is -12010

 both are not equal        ·12010-12010

: Option (B) is incorrect

:Option (D): -20092010

-2009201012010

 : Option (D) is incorrect

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