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Area of the parallelogram formed by the lines y=mx,y=mx+1,y=nx and y= nx and y=nx +1 equals

A

`|m+n|/((m+n)^2)`

B

`2/|m+n|`

C

`1/|m+n|`

D

`1/|m-n|`

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The correct Answer is:
D
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