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Mathematics
Mathematics
Problem
If
∣
a
⃗
∣
=
2
|\vec{a}|=2
∣
a
∣
=
2
,
∣
b
⃗
∣
=
3
|\vec{b}|=3
∣
b
∣
=
3
and
∣
2
a
⃗
−
b
⃗
∣
=
5
|2\vec{a}-\vec{b}|=5
∣2
a
−
b
∣
=
5
, then
∣
2
a
⃗
+
b
⃗
∣
|2\vec{a}+\vec{b}|
∣2
a
+
b
∣
equals : (1) 1 (2) 17 (3) 5 (4) 7
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