## Question

###### Area of the parallelogram formed by the lines $y=m x, y=m x+1, y=$ $n x$ and $y=n x+1$ equals [2001S](a) $quad|m+n| /(m-n)^{2}$(b) $2 /|m+n|$(c) $1 /(|m+n|)$(d) $1 /(|m-n|)$

Area of the parallelogram formed by the lines $y=m x, y=m x+1, y=$ $n x$ and $y=n x+1$ equals [2001S] (a) $quad|m+n| /(m-n)^{2}$ (b) $2 /|m+n|$ (c) $1 /(|m+n|)$ (d) $1 /(|m-n|)$

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