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The pair of lines represented by the equations 2x+y+3 = 0 and 4x+ky+6 = 0 will be parallel if value of k is

Posted by Varsha Narwariya 6 years, 3 months ago

CBSE > Class 10 > Mathematics

6 answers

Varsha Narwariya 6 years, 3 months ago

Yes it's the question from cbse sample paper (basic)

Arpit Maurya 6 years, 3 months ago

K=2

Yogita Ingle 6 years, 3 months ago

2x + y + 3 = 0
4x + ky + 6 = 0
For a pair of lines to be parallel, the ratio of the respective coefficients and the constant terms must be the same.

{tex}\therefore \dfrac{2}{4}=\dfrac{1}{k}=\dfrac{3}{6}\\\Rightarrow k=\dfrac{4}{2}\\\Rightarrow k=2{/tex}

hence, the value of k must be 2 in order to have the given pair of lines parallel to each other.

Miss Zainab 6 years, 3 months ago

a¹/a²=b¹/b² 2/4=1/k So. K=2

Miss Zainab 6 years, 3 months ago

The value of k is 2

Manjunatha Udupa 6 years, 3 months ago

Are u sure that's the question??

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