1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard VIII
Mathematics
Polynomials
If a →=3 ii-j...
Question
If
a
→
=
3
i
^
-
j
^
-
4
k
^
,
b
→
=
-
2
i
^
+
4
j
^
-
3
k
^
and
c
→
=
i
^
+
2
j
^
-
k
^
,
find
3
a
→
-
2
b
→
+
4
c
→
.
Open in App
Solution
Given:
a
→
=
3
i
^
-
j
^
-
4
k
^
,
b
→
=
-
2
i
^
+
4
j
^
-
3
k
^
and
c
→
=
i
^
+
2
j
^
-
k
^
.
Now
,
3
a
→
-
2
b
→
+
4
c
→
=
3
3
i
^
-
j
^
-
4
k
^
-
2
-
2
i
^
+
4
j
^
-
3
k
^
+
4
i
^
+
2
j
^
-
k
^
=
9
i
^
-
3
j
^
-
12
k
^
+
4
i
^
-
8
j
^
+
6
k
^
+
4
i
^
+
8
j
^
-
4
k
^
=
17
i
^
-
3
j
^
-
10
k
^
Hence,
3
a
→
-
2
b
→
+
4
c
→
=
17
2
+
-
3
2
+
-
10
2
=
289
+
9
+
100
=
398
Suggest Corrections
0
Similar questions
Q.
If
a
→
=
3
i
^
-
j
^
-
4
k
^
,
b
→
=
-
2
i
^
+
4
j
^
-
3
k
^
and
c
→
=
i
^
+
2
j
^
-
k
^
,
find
3
a
→
-
2
b
→
+
4
c
→
.
Q.
Let
a
→
=
i
^
+
4
j
^
+
2
k
^
,
b
→
=
3
i
^
-
2
j
^
+
7
k
^
and
c
→
=
2
i
^
-
j
^
+
4
k
^
.
Find a vector
d
→
which is perpendicular to both
a
→
and
b
→
and
c
→
·
d
→
=
15
.
Q.
Find the cross products of the vectors
1.
a
=
i
−
2
j
+
3
k
,
b
=
3
i
−
6
j
+
9
k
2.
a
=
−
2
i
−
4
k
,
b
=
i
−
2
j
−
k
,
c
=
i
−
4
j
+
3
k
Q.
Find
a
→
b
→
c
→
, when
(i)
a
→
=
2
i
^
-
3
j
^
,
b
→
=
i
^
+
j
^
-
k
^
and
c
→
=
3
i
^
-
k
^
(ii)
a
→
=
i
^
-
2
j
^
+
3
k
^
,
b
→
=
2
i
^
+
j
^
-
k
^
and
c
→
=
j
^
+
k
^
Q.
If
→
a
=
2
ˆ
i
+
ˆ
j
−
3
ˆ
k
and
→
b
=
ˆ
i
−
4
ˆ
k
then, find
|
→
a
−
→
b
|
.
View More
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
Related Videos
Polynomials in One Variable
MATHEMATICS
Watch in App
Explore more
Polynomials
Standard VIII Mathematics
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
AI Tutor
Textbooks
Question Papers
Install app
