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NIELIT 2019 Feb Scientist D - Section D: 4

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As $P(x,y)$ is any point on the line joining the points $A$ and $B$,

Take $P(x,y) = A(a,0) \implies x=a,y=0$

$bx +ay – ab = ba + a\cdot0- ab = 0$

Option C.

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