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Mathematics
Mathematics
Problem
The expression
(
1
2
i
^
+
1
2
j
^
)
\left(\frac{1}{\sqrt{2}}\hat{i} + \frac{1}{\sqrt{2}}\hat{j}\right)
(
2
1
i
^
+
2
1
j
^
)
is a (a) Unit vector (b) Null vector (c) Vector of magnitude
2
\sqrt{2}
2
(d) Scalar
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