Question

find k for unique solution of equation kx+y=10 and ky-x=7

Answer 1

Answer:

Step-by-step explanation:

Two lines

ax+by=c………(1)

and

cx+dy=e……..(2)

Are has a unique solution

If

a/c ≠ b/d.

In the given equation

a=k , b=(-1), c=6, d=(-2).

So by the condition

k/6 ≠ (-1/-2)

Or, k/6 ≠ 1/2

Or, k ≠ 3.

So for any real value k except 3.

Answer 2

a1/a2not equal to b1/b2


k/-1 not equal to 1/k

2K not equal to -1

k not equal to -1/2