Find the image of the point (0, 2, 3) in the line
Find the image of the point (0, 2, 3) in the line

Find the image of the point (0,2,3) in the line \frac{\mathrm{x}+3}{5}=\frac{\mathrm{y}-1}{2}=\frac{\mathrm{z}+4}{3}.
Answer
Given: Equation of line is \frac{\mathrm{x}+3}{5}=\frac{\mathrm{y}-1}{2}=\frac{\mathrm{z}+4}{3}.
To find: image of point (0,2,3)
Formula Used: Equation of a line is
Vector form: \overrightarrow{\mathrm{I}}=\overrightarrow{\mathrm{a}}+\mathrm{\lambda} \overrightarrow{\mathrm{b}}
Cartesian form: \frac{\mathrm{x}-\mathrm{r}_{1}}{\mathrm{~b}_{\mathrm{n}}}=\frac{\mathrm{y}-\mathrm{y}_{1}}{\mathrm{~b}_{\mathrm{z}}}=\frac{\mathrm{z}-\mathrm{z}_{1}}{\mathrm{k}_{\mathrm{s}}}=\lambda
where \vec{a}=x_{1} \hat{\imath}+y_{1} \hat{l}+z_{1} \hat{k} is a point on the line and \vec{b}=b_{1} \hat{i}+b_{2} \hat{l}+b_{3} \hat{k} with b_{1}: b_{2}: b_{3} being the direction ratios of the line.
If 2 lines of direction ratios a_{1}: a_{2}: a_{3} and b_{1}: b_{2}: b_{3} are perpendicular, then a_{1} b_{1}+a_{2} b_{2}+a_{3} b_{3}=0 Mid-point of line segment joining \left(\mathrm{x}_{1}, \mathrm{y}_{1}, \mathrm{z}_{1}\right) and \left(\mathrm{x}_{2}, \mathrm{y}_{2}, \mathrm{z}_{2}\right) is

x1x22,y1y22,z1z22
\left(\frac{x_{1}-x_{2}}{2}, \frac{y_{1}-y_{2}}{2}, \frac{z_{1}-z_{2}}{2}\right)

Explanation:
Let

x+35=y12=z+43=λ
\frac{x+3}{5}=\frac{y-1}{2}=\frac{z+4}{3}=\lambda

So the foot of the perpendicular is (5 \lambda-3,2 \lambda+1,3 \lambda-4)
The direction ratios of the perpendicular is

(5λ30):(2λ+12):(3λ43)(5λ3):(2λ1):(3λ7)
\begin{array}{l}
(5 \lambda-3-0):(2 \lambda+1-2):(3 \lambda-4-3) \\
\Rightarrow(5 \lambda-3):(2 \lambda-1):(3 \lambda-7)
\end{array}

Direction ratio of the line is 5: 2: 3