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If 2x+y+lambda=0 is a normal to the para...

If `2x+y+lambda=0` is a normal to the parabola `y^2=-8x ,` then `lambda` is (a)12 (b) `-12` (c) 24 (d) `-24`

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CENGAGE ENGLISH-CONIC SECTIONS-All Questions
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  3. If 2x+y+lambda=0 is a normal to the parabola y^2=-8x , then lambda is ...

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