The position vector of a point at a distance of \[3\sqrt{11}\] units from \[\mathbf{i}-\mathbf{j}+2\mathbf{k}\] on a line passing through the points \[\mathbf{i}-\mathbf{j}+2\mathbf{k}\] and \[3\mathbf{i}+\mathbf{j}+\mathbf{k}\] is

\[8\mathbf{i}+4\mathbf{j}+\mathbf{k}\]

\[10\mathbf{i}+2\mathbf{j}-5\mathbf{k}\]

\[-8\mathbf{i}-4\mathbf{j}-\mathbf{k}\]

\[8\mathbf{i}+4\mathbf{j}+\mathbf{k}\]

\[-10\mathbf{i}-2\mathbf{j}-5\mathbf{k}\]

The position vector of a point at a distance of \[3\sqrt{11}\] units f

1.	The position vector of a point at a distance of \[3\sqrt{11}\] units from \[\mathbf{i}-\mathbf{j}+2\mathbf{k}\] on a line passing through the points \[\mathbf{i}-\mathbf{j}+2\mathbf{k}\] and \[3\mathbf{i}+\mathbf{j}+\mathbf{k}\] is
A.	\[10\mathbf{i}+2\mathbf{j}-5\mathbf{k}\]
B.	\[-8\mathbf{i}-4\mathbf{j}-\mathbf{k}\]
C.	\[8\mathbf{i}+4\mathbf{j}+\mathbf{k}\]
D.	\[-10\mathbf{i}-2\mathbf{j}-5\mathbf{k}\]
Answer» C. \[8\mathbf{i}+4\mathbf{j}+\mathbf{k}\]

Discussion

No Comment Found

Related MCQs

If three non-zero vectors are \[\mathbf{a}={{a}_{1}}\mathbf{i}+{{a}_{2}}\mathbf{j}+{{a}_{3}}\mathbf{k},\] \[\mathbf{b}={{b}_{1}}\mathbf{i}+{{b}_{2}}\mathbf{j}+{{b}_{3}}\mathbf{k}\] and \[\mathbf{c}={{c}_{1}}\mathbf{i}+{{c}_{2}}\mathbf{j}+{{c}_{3}}\mathbf{k}.\] If c is the unit vector perpendicular to the vectors a and b and the angle between a and b is \[\frac{\pi }{6},\] then \[{{\left| \,\begin{matrix}{{a}_{1}} & {{a}_{2}} & {{a}_{3}}\\{{b}_{1}} & {{b}_{2}} & {{b}_{3}}\\ {{c}_{1}} & {{c}_{2}} & {{c}_{3}}\\ \end{matrix}\, \right|}^{2}}\] is equal to [IIT 1986]
If a of magnitude 50 is collinear with the vector \[\mathbf{b}=6\,\mathbf{i}-8\,\mathbf{j}-\frac{15\,\mathbf{k}}{2},\] and makes an acute angle with the positive direction of z-axis, then the vector a is equal to [Pb. CET 2004]
If two vertices of a triangle are \[\mathbf{i}-\mathbf{j}\] and \[\mathbf{j}+\mathbf{k}\], then the third vertex can be [Roorkee 1995]
The vectors \[\overrightarrow{AB}=3\mathbf{i}+5\mathbf{j}+4\mathbf{k}\] and \[\overrightarrow{AC}=5\mathbf{i}-5\mathbf{j}+2\mathbf{k}\] are the sides of a triangle ABC. The length of the median through A is [UPSEAT 2004]
If a, b and c are unit vectors, then \[|\mathbf{a}-\mathbf{b}{{|}^{2}}+|\mathbf{b}-\mathbf{c}{{|}^{2}}+|\mathbf{c}-\mathbf{a}{{|}^{2}}\]does not exceed [IIT Screening 2001]
The vectors b and c are in the direction of north-east and north-west respectively and |b|=|c|= 4. The magnitude and direction of the vector d = c - b, are [Roorkee 2000]
The value of 'a' so that the volume of parallelopiped formed by \[\mathbf{i}+a\mathbf{j}+\mathbf{k},\mathbf{j}+a\,\mathbf{k}\] and \[a\,\mathbf{i}+\mathbf{k}\] becomes minimum is [IIT Screening 2003]
If \[\mathbf{u}=2\,\mathbf{i}+2\mathbf{j}-\mathbf{k}\]and \[\mathbf{v}=6\,\mathbf{i}-3\,\mathbf{j}+2\,\mathbf{k},\] then a unit vector perpendicular to both u and v is [MP PET 1987]
A vector a has components 2p and 1 with respect to a rectangular cartesian system. The system is rotated through a certain angle about the origin in the anti-clockwise sense. If a has components p+1 and 1 with respect to the new system, then [IIT 1984]
Let \[\mathbf{a}=2\mathbf{i}-\mathbf{j}+\mathbf{k},\,\,\mathbf{b}=\mathbf{i}+2\mathbf{j}-\mathbf{k}\] and \[\mathbf{c}=\mathbf{i}+\mathbf{j}-2\mathbf{k}\] be three vectors. A vector in the plane of b and c whose projection on a is of magnitude \[\sqrt{2/3}\] is [IIT 1993; Pb. CET 2004]

The position vector of a point at a distance of \[3\sqrt{11}\] units from \[\mathbf{i}-\mathbf{j}+2\mathbf{k}\] on a line passing through the points \[\mathbf{i}-\mathbf{j}+2\mathbf{k}\] and \[3\mathbf{i}+\mathbf{j}+\mathbf{k}\] is

Discussion

No Comment Found

Related MCQs

Reply to Comment