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Answer:
[tex](\frac{5}{\sqrt{34}} ,\frac{-3}{\sqrt{34}} )[/tex]
Step-by-step explanation:
The vector v:
(2,4)-(-3,7)
=(5,-3)
norm:
||(5,-3)||=[tex](5^2+3^2)^{ 1/2}=\sqrt{34}[/tex]
unit vector:
[tex](\frac{5}{\sqrt{34}} ,\frac{-3}{\sqrt{34}} )[/tex]