ExamBro
ExamBro
enEnglishhiहिन्दीguગુજરાતી
JEE Mains · Maths · STD 11 - 9. straight line

જો બે રેખાઓ \(x + \left( {a - 1} \right)\,y = 1\) અને \(2x + {a^2}y = 1\,\left( {a \in R - \left\{ {0,1} \right\}} \right)\) એકબીજાને લંબ હોય તો તેમના છેદબિંદુનું ઉંગમબિંદુથી અંતર મેળવો. 

  1. A \(\frac{2}{5}\)
  2. B \(\frac{{\sqrt 2 }}{5}\)
  3. C \(\frac{2}{{\sqrt 5 }}\)
  4. D \(\sqrt {\frac{2}{5}} \)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\sqrt {\frac{2}{5}} \)

Step-by-step Solution

Detailed explanation

Two lines are perpendicular \(\therefore {m_1}{m_2} = - 1\) \( \Rightarrow \left( {\frac{{ - 1}}{{a - 1}}} \right)\left( {\frac{{ - 2}}{{{a^2}}}} \right) = - 1\) \( \Rightarrow {a^3} - {a^2} + 2 = 0\) \( \Rightarrow \left( {a + 1} \right)\left( {{a^2} - 2a + 2} \right) = 0\)…
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app