Mathematics
Senior High
座標で表さなくても他の矢印で表せば内積は求められるのでしょうか
解答
OA=4,OB=6 とおくと
-a+g, BP=-6- +
AQ== a +
AQ-BP = (-a + 4).(-6+4)
2
Tāl²
161²
2
3
3
+
7→
+
·a.b
81
2
=2/06-105
7→
a.b
36
3
A
9
P
B
6
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