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Aditi Sharma
Subject: Maths
, asked on 14/12/17
Plz solve
Q48. Show that the vectors
$\overrightarrow{\mathrm{a}},\overrightarrow{\mathrm{b}}\mathrm{and}\overrightarrow{\mathrm{c}}$
are coplanar, if
$\overrightarrow{\mathrm{a}}+\overrightarrow{\mathrm{b}},\overrightarrow{\mathrm{b}}+\overrightarrow{\mathrm{c}}\mathrm{and}\overrightarrow{\mathrm{c}}+\overrightarrow{\mathrm{a}}$
are coplanar.
Or
Prove that, for any three vectors
$\overrightarrow{\mathrm{a}},\overrightarrow{\mathrm{b}}\mathrm{and}\overrightarrow{\mathrm{c}}$
,
$\left[\overrightarrow{\mathrm{a}}+\overrightarrow{\mathrm{b}}\overrightarrow{\mathrm{b}}+\overrightarrow{\mathrm{c}}\overrightarrow{\mathrm{c}}+\overrightarrow{\mathrm{a}}\right]=2\left[\overrightarrow{\mathrm{a}}\overrightarrow{\mathrm{b}}\overrightarrow{\mathrm{c}}\right]$
.
Answer
2
Nithyashrri Saravanan
Subject: Maths
, asked on 12/12/17
Pls solve this
Answer
1
Snegaa J. S.
Subject: Maths
, asked on 10/12/17
The charges q1 = 2 µC and q2 = – 4 µC are located at coordinates (–1, –1) and (3, 2) respectively. If we have put one more charge q3 = 8 µC in the line joining the two charges such that the charges maintain an equilibrium, then find the coordinate
Answer
1
Yamini Jayachandran
Subject: Maths
, asked on 10/12/17
Determine K such that a vector r is at right angles to each of the vectors a= Ki+j+3k, b+2i+j-Kk, and c=2i+Kj+3k.
No links please
Thank you :)
Answer
1
Chaitanya Kapoor
Subject: Maths
, asked on 8/12/17
Plzz solve.
Q.23.
$\overrightarrow{a}+\overrightarrow{b}+\overrightarrow{c}=\overrightarrow{0},\left|\overrightarrow{a}\right|=3,\left|\overrightarrow{b}\right|=5and\left|\overrightarrow{c}\right|=7$
, find the angle between
$\overrightarrow{b}and\overrightarrow{c}$
.
Answer
1
Archana
Subject: Maths
, asked on 6/12/17
the points A, B and C have position vectors 3i-yj+2k , 5i-j+k and 3xi+3j - k are collinear. Find the values x and y and also the ratio in which the point B divides AC.
Answer
1
Varnika Dhiman
Subject: Maths
, asked on 4/12/17
Shouldn't AC vector = i^ -3j^ -5k^ ?!..
Answer
1
Sofiya Parihar
Subject: Maths
, asked on 24/11/17
In ecample 3 i dotn understand that how the three vectors in the answer given are collinear
Answer
1
Ritesh Ranjan Rath
Subject: Maths
, asked on 24/11/17
Q11
Q.11. Given,
$\overrightarrow{a}.\overrightarrow{b}=12,\left|\overrightarrow{a}\times \overrightarrow{b}\right|=16and\left|\overrightarrow{b}\right|=2$
, find
$\left|\overrightarrow{a}\right|$
.
Answer
1
Subhashini
Subject: Maths
, asked on 17/11/17
Please answer question no 12 in the attached file
Answer
1
Subhashini
Subject: Maths
, asked on 17/11/17
10)
$If\overrightarrow{a}\times \overrightarrow{b}=\overrightarrow{a}\times \overrightarrow{c},\overrightarrow{a}\ne \overrightarrow{c}and\overrightarrow{b}\ne \overrightarrow{c},showthat\overrightarrow{b}=\overrightarrow{c}+t\overrightarrow{a}forsomescalart.$
Answer
1
Shri Ganesh
Subject: Maths
, asked on 16/11/17
please help me sovle this question
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 16/11/17
No links please
$Chaptername:\phantom{\rule{0ex}{0ex}}Vector\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}16.If\overrightarrow{AO}+\overrightarrow{OB}=\overrightarrow{BO}+\overrightarrow{OC},showthatthepointsA,BandCarecollinear.$
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 16/11/17
No links please
Chapter name :
Vector
Q15. Let D ,E , F are the midpoints of the sides
$\overline{)BC},\overline{)CA}\mathrm{and}\overline{)AB}$
of the triangle ABC. Prove that
$\overrightarrow{AD}+\overrightarrow{BE}+\overrightarrow{CF}=\overrightarrow{0}.$
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 16/11/17
No links please
Answer
1
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Q48. Show that the vectors $\overrightarrow{\mathrm{a}},\overrightarrow{\mathrm{b}}\mathrm{and}\overrightarrow{\mathrm{c}}$ are coplanar, if $\overrightarrow{\mathrm{a}}+\overrightarrow{\mathrm{b}},\overrightarrow{\mathrm{b}}+\overrightarrow{\mathrm{c}}\mathrm{and}\overrightarrow{\mathrm{c}}+\overrightarrow{\mathrm{a}}$ are coplanar.

Or

Prove that, for any three vectors $\overrightarrow{\mathrm{a}},\overrightarrow{\mathrm{b}}\mathrm{and}\overrightarrow{\mathrm{c}}$,$\left[\overrightarrow{\mathrm{a}}+\overrightarrow{\mathrm{b}}\overrightarrow{\mathrm{b}}+\overrightarrow{\mathrm{c}}\overrightarrow{\mathrm{c}}+\overrightarrow{\mathrm{a}}\right]=2\left[\overrightarrow{\mathrm{a}}\overrightarrow{\mathrm{b}}\overrightarrow{\mathrm{c}}\right]$.

No links please

Thank you :)

Q.23. $\overrightarrow{a}+\overrightarrow{b}+\overrightarrow{c}=\overrightarrow{0},\left|\overrightarrow{a}\right|=3,\left|\overrightarrow{b}\right|=5and\left|\overrightarrow{c}\right|=7$, find the angle between $\overrightarrow{b}and\overrightarrow{c}$.

Q.11. Given, $\overrightarrow{a}.\overrightarrow{b}=12,\left|\overrightarrow{a}\times \overrightarrow{b}\right|=16and\left|\overrightarrow{b}\right|=2$, find $\left|\overrightarrow{a}\right|$.

$Chaptername:\phantom{\rule{0ex}{0ex}}Vector\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}16.If\overrightarrow{AO}+\overrightarrow{OB}=\overrightarrow{BO}+\overrightarrow{OC},showthatthepointsA,BandCarecollinear.$

Chapter name :

Vector

Q15. Let D ,E , F are the midpoints of the sides $\overline{)BC},\overline{)CA}\mathrm{and}\overline{)AB}$ of the triangle ABC. Prove that $\overrightarrow{AD}+\overrightarrow{BE}+\overrightarrow{CF}=\overrightarrow{0}.$