if the sum of the slopes of the lines gi...

if the sum of the slopes of the lines given by `x^2-2cxy-7y^2=0` is four times
their product then c has the value?

A

(a) `-2`

B

(b) `-1`

C

(c) `2`

D

(d) `1`

Verified by Experts

The correct Answer is:

C

NA

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