Question

Consider aparallelogram $ABCD$ as shown with equation of its all four sides. The equation of the diagonal $AC$ is given by

• A. $u _1 u _2- u _3 u _4=0$
• B. $u _1 u _4- u _2 u _3=0$
• C. $u_1+\lambda u_2=0$ where $\lambda$ is the value for which the lines $u_1+\lambda u_2=0, u_3=0$ and $u_4=0$ are concurrent.
• D. $u _1+\lambda u _4=0$ where $\lambda$ is the value for which the lines $u _1+\lambda u _4, u _2=0$ and $u _3=0$ are concurrent.

Answer 1

Answer: (B), (C)

Correct answer is (b) $u _1 u _4- u _2 u _3=0$Correct answer is (c) $u_1+\lambda u_2=0$ where $\lambda$ is the value for which the lines $u_1+\lambda u_2=0, u_3=0$ and $u_4=0$ are concurrent.