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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

`(-3,-9)`

B

`(-3,-8)`

C

`((1)/(3)-(8)/(3))`

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
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