First slide

Pair of straight lines

Question

The equation $x^{3} - 6 x^{2} y + 11 x y^{2} - 6 y^{3} = 0$ represent three straight lines passing through the origin, the slops of which form

Moderate

A

an A.P.
B

a G.P.
C

an H.P.
D

none of these

Solution

We can write $(x - y) (x - 2 y) (x - 3 y) = 0$

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