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Mathematics
Mathematics
Problem
Let
a
⃗
=
3
i
+
4
j
\vec{a}=3\mathbf{i}+4\mathbf{j}
a
=
3
i
+
4
j
and
b
⃗
=
−
i
+
2
j
\vec{b}=-\mathbf{i}+2\mathbf{j}
b
=
−
i
+
2
j
. a. (i) Find the vector
a
⃗
+
b
⃗
\vec{a}+\vec{b}
a
+
b
. b. (ii) Calculate its magnitude.
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