The lines frac{x-0}{1}=frac{y-2}{2}=frac{z+3} | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The lines are $L_1: \frac{x}{1} = \frac{y-2}{2} = \frac{z+3}{\lambda}$ and $L_2: \frac{x-2}{2} = \frac{y-6}{3} = \frac{z-3}{\lambda}$.Points on th

Vedclass · Accepted Answer

$(1, 6, 4)$

Vedclass · Answer

(A) The lines are $L_1: \frac{x}{1} = \frac{y-2}{2} = \frac{z+3}{\lambda}$ and $L_2: \frac{x-2}{2} = \frac{y-6}{3} = \frac{z-3}{\lambda}$.Points on the lines are $A(0, 2, -3)$ and $B(2, 6, 3)$.Direction vectors are $\vec{v_1} = \hat{i} + 2\hat{j} + \lambda\hat{k}$ and $\vec{v_2} = 2\hat{i} + 3\hat{j} + \lambda\hat{k}$.The normal to the plane is $\vec{n} = \vec{v_1} 	imes \vec{v_2} = \begin{vmatrix} \hat{i} & \hat{j} & \hat{k} \ 1 & 2 & \lambda \ 2 & 3 & \lambda \end{vmatrix} = \hat{i}(2\lambda - 3\lambda) - \hat{j}(\lambda - 2\lambda) + \hat{k}(3 - 4) = -\lambda\hat{i} + \lambda\hat{j} - \hat{k}$.The equation of the plane is $-\lambda(x - 0) + \lambda(y - 2) - 1(z + 3) = 0$,which simplifies to $-\lambda x + \lambda y - 2\lambda - z - 3 = 0$.Rearranging,we get $-\lambda(x - y + 2) - (z + 3) = 0$.For this to hold for all $\lambda$,we must have $x - y + 2 = 0$ and $z + 3 = 0$.Thus,the plane always passes through the line of intersection of $x - y + 2 = 0$ and $z = -3$.Checking the options: For $(2, 4, -3)$,$2 - 4 + 2 = 0$ and $-3 = -3$. None of the given options satisfy this directly,but re-evaluating the point $(2, 4, -3)$ is not listed. Checking $(4, 10, 9)$ is incorrect. Let's re-check the point $(2, 8, 7)$ or others. Actually,the point $(2, 4, -3)$ is the intersection. Testing $(4, 6, -3)$ or similar. Given the options,let's test $(2, 4, -3)$ which is not there. Re-checking the question,the correct point is $(2, 4, -3)$. Since it is not in the options,we identify the point that satisfies the plane equation for all $\lambda$.

The lines $\frac{x-0}{1}=\frac{y-2}{2}=\frac{z+3}{\lambda}$ and $\frac{x-2}{2}=\frac{y-6}{3}=\frac{z-3}{\lambda}$ are coplanar. If $p$ is the plane containing these lines,then which of the following points lies on the plane for all values of $\lambda$?

Similar Questions

Find the distance between the line $\vec{r} = (2\hat{i} - 2\hat{j} + 3\hat{k}) + \lambda(\hat{i} - \hat{j} + 4\hat{k})$ and the plane $\vec{r} \cdot (\hat{i} + 5\hat{j} + \hat{k}) = 5$.

The vector equation of a plane in parametric form, passing through the points $A(-1, 2, 0)$ and $B(2, 2, -1)$ and parallel to the line $\frac{x - 1}{1} = \frac{2y + 1}{2} = \frac{z + 1}{-1}$ is:

The distance of the point $P(1, 0, -3)$ from the plane $x - y - z = 9$ measured parallel to the line $\frac{x - 2}{2} = \frac{y + 2}{3} = \frac{z - 6}{-6}$ is (in $\text{ units}$)

The distance between the line $\frac{x - 1}{3} = \frac{y + 2}{-2} = \frac{z - 1}{2}$ and the plane $2x + 2y - z = 6$ is

If the plane $4x + 4y - kz = 0$ is the equation of the plane passing through the origin and containing the line $\frac{x - 1}{2} = \frac{y + 1}{3} = \frac{z}{4}$,find the value of $k$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module