For what value of k. will the equation x+2y+7=0,2x+ky+14=O represent concident lines
Answers
Answered by
1
Answer:
k= 4
Step-by-step explanation:
concident lines means . second line is twice the first line .
so,
first line is x+2y+7.
second line is twice the first line , i.e 2(x+2y+7) = 2x+4y+14
Answered by
2
Answer:
Criterion for coincidence is
a1/a2 = b1/b2 = c1/C2
1/2=2//k
This gives k=4
Since there is one unknown k, so equating a1/a2= b1/b2 is sufficient. You can also take b1/b2= c1/c2
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