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Solution 4.1:4b

From Förberedande kurs i matematik 1

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If we use the distance formula

d=(x−a)2+(y−b)2 

to determine the distance between the points (xy)=(−25) and (ab)=(3−1), we get

d=(−2−3)2+(5−(−1))2=(−5)2+62=25+36=61.
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