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Byju's Answer
Standard XII
Mathematics
Cross Product of Two Vectors
Find the valu...
Question
Find the value of
x
in
∣
∣
∣
2
4
5
1
∣
∣
∣
=
∣
∣
∣
2
x
4
6
x
∣
∣
∣
.
A
±
√
3
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B
2
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C
3
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D
4
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Solution
The correct option is
A
±
√
3
Since both determinants are equal, thus,
2
x
2
−
24
=
2
−
20
2
x
2
=
2
−
20
+
24
2
x
2
=
6
x
2
=
3
x
=
±
√
3
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Similar questions
Q.
Find the values of
x
, if
(i)
∣
∣
∣
2
4
5
1
∣
∣
∣
=
∣
∣
∣
2
x
4
6
x
∣
∣
∣
(ii)
∣
∣
∣
2
3
4
5
∣
∣
∣
=
∣
∣
∣
x
3
2
x
5
∣
∣
∣
Q.
Find values of
x
, if
(i)
2
4
5
1
=
2
x
4
6
x
(ii)
2
3
4
5
=
x
3
2
x
5