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Two sides of a rhombus are along the lin...

Two sides of a rhombus are along the lines,`x-y+1=0` and `7x-y-5=0` . If its diagonals intersect at `(-1,-2)` , then which one of the following is a vertex of this rhombus ? (1) `(-3,-9)` (2) `(-3,-8)` (3) `(1/3,-8/3)` (4) `(-(10)/3,-7/3)`

A

`(1/3,8/3)`

B

`(-10/3,-7/3)`

C

`(-3,-9)`

D

`(-3,-8)`

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A
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DISHA PUBLICATION-STRAIGHT LINES AND PAIR OF STRAIGHT LINES-EXERCISE 2: CONCEPT APPLICATOR
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