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NDA Math Vector Algebra

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Question : 80 of 101
 
Marks: +1, -0
The vectors
→
a
,
→
b
,
→
c
 and
→
d
 are such that
→
a
×
→
b
=
→
c
×
→
d
 and
→
a
×
→
c
=
→
b
×
→
d
.Which of the following is/are correct
1.(
→
a
−
→
d
)×(
→
b
−
→
c
)=
→
0

2. (
→
a
×
→
b
)×(
→
c
×
→
d
)=
→
0

Select the correct answer using the code given below
[NDA II 2015]
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