Известно, что [tex]|\vec{a}| = 2[/tex], [tex]|\vec{b}| = 1[/tex], а скалярное произведение [tex](\vec{a}+3\vec{b},\vec{a}-2\vec{b})=1[/tex]. Найти скалярное произведение векторов [tex]\vec{a}[/tex] и [tex]\vec{b}[/tex].
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