[tex]\displaystyle\bf\\F(t)=t^{2} +2\\\\V(t)=F'(t)=(t^{2} )'+2'=2t+0=2t\\\\V(3)=2\cdot 3=6[/tex]
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[tex]\displaystyle\bf\\F(t)=t^{2} +2\\\\V(t)=F'(t)=(t^{2} )'+2'=2t+0=2t\\\\V(3)=2\cdot 3=6[/tex]