Question

for what Valve k system of equation 5x -7y -5= 0 and 2x+ky-1=0 have unique solution​

Answer 1

Answer:

k=-2.8

Explanation:

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Answer 2

Explanation:

for unique solution a1/a2 is not equal to b1/b2

so in the above eqns a1= 5 and b1= -7 and c1=-5

a2= 2 b2=k and c2=-1

a1/a2 is not equal to b1/b2

= 5/2 =/= -7/k

so k=/= -7×2/5

= k=/= -14/5

Thus, given lines have a unique solution for all real values of k, except -14/5