The Total solution for NCERT class 6-12
x= -λ, y= Equation is x + 4y – 7 = 0Substituting the value of x and y,-λ + 4 x -7 = 0
⇒ -λ + 10 – 7 = 0⇒ -λ +3 = 0∴ -λ = -3⇒ λ = 3Hence λ = 3