Mathematics
Senior High
(1)~(4)の解き方教えて欲しいです。
AOABがあり,点PはOP =sOA+tOB で表さ
れる点とする.
s, tが次の式を満たしながら変化するとき,点P
の存在する範囲を示せ.
(1)0≦s≦1,0≦t≦1
(2)s+2t=1
(3)3s+2t=6, s≧0, t≧0
(4) s+t≤1, s≥0, t≥0
S
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