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If the slope of the .line joíning (2,5) ...

If the slope of the .line joíning `(2,5)` and `(3, lambda)` is `-2`, find the value of `lambda`.

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Let the given.points be `A(2,5)` and `B(3, lambda)`.
Slope of `AB=-2`
`therefore-2=lambda-5/3-2`
`-2=lambda--5`
ie `lambda=3`
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