Question

For what value of k,do the equation 3x-y+8=0and 6x-kt-16represent coincident lines

Answer 1

Answer:

Given equations are 3x−y+8=0 and 6x−ky=−16

For coincident lines,

6

3

=

−k

−1

⇒

2

1

=

k

1

⇒k=2

For option A:

3

k

−9=3

2

−9=0

which satisfies R.H.S.

Now for option B:

2

k

−8=2

2

−8=4−8=−4

which does not satisfies R.H.S.

Hence, options A and C are correct