Straight Line Question 44

Question: For what value of ‘a’ the lines $ x=3,y=4 $ and $ 4x-3y+a=0 $ are concurrent [RPET 1984]

Options:

A) 0

B) -1

C) 2

D) 3

Show Answer

Answer:

Correct Answer: A

Solution:

  • Here the lines are $ x-3=0,y-4=0 $ and $ 4x-3y+a=0 $ . These will be concurrent, if $ | \begin{matrix} 1 & 0 & -3 \\ 0 & 1 & -4 \\ 4 & -3 & a \\ \end{matrix} |=0\Rightarrow a=0 $ .