Respuesta :

[tex]\begin{gathered} 3S\text{ = 3(7,-5) = (3}\cdot7,3\cdot(-5)\text{) = (21,-15)} \\ S+T\text{ = (s1+t1,s2+t2)} \\ S+T\text{ = (7+4,-5+6)} \\ S+T\text{ = (11,1)} \end{gathered}[/tex]

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