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The point of intersection of the lines x...

The point of intersection of the lines `x/a+y/b=1` and `x/b+y/a=1` lies on the line

A

x - y = 0

B

(x + y)(a + b) = 2ab

C

(lx +my)(a + b) = (l +m) ab

D

All of these

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The correct Answer is:
D
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