The ratio in which the line segment jo...

The ratio in which the line segment joining points `A(a_1,\ b_1)` and `B(a_2,\ b_2)` is divided by y-axis is (a) ` -a_1: a_2` (b) `a_1: a_2` (c) `b_1: b_2` (d) `-b_1: b_2`

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