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CBSE Class 12 Math 2012 Solved Paper

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Question : 9
Total: 29
Find the sum of the following vectors:
→
a
 =
^
i
−2
^
j
 ,
→
b
 = 2
^
i
−3
^
j
 ,
→
c
 = 2
^
i
+3
^
k
Solution:  
Sum of the vectors,
→
a
 +
→
b
 +
→
c
 = (
^
i
−2
^
j
) + (2
^
i
−3
^
j
) + (2
^
i
+3
^
k
)
= 5
^
i
−5
^
j
+3
^
k
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