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Mathematics
Mathematics
Problem
The direction ratios of a vector are
1
:
2
:
−
2
1:2:-2
1
:
2
:
−
2
. If its magnitude is
18
18
18
units, identify the vector. a)
18
i
^
+
36
j
^
−
36
k
^
18\hat{i}+36\hat{j}-36\hat{k}
18
i
^
+
36
j
^
−
36
k
^
b)
6
i
^
+
12
j
^
+
12
k
^
6\hat{i}+12\hat{j}+12\hat{k}
6
i
^
+
12
j
^
+
12
k
^
c)
6
i
^
+
12
j
^
−
12
k
^
6\hat{i}+12\hat{j}-12\hat{k}
6
i
^
+
12
j
^
−
12
k
^
d)
3
i
^
+
6
j
^
−
6
k
^
3\hat{i}+6\hat{j}-6\hat{k}
3
i
^
+
6
j
^
−
6
k
^
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