7/3=2/r-7

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Solution for 7/3=2/r-7 equation: 


D( r )

r = 0

r = 0

r = 0

r in (-oo:0) U (0:+oo)

7/3 = 2/r-7 // - 2/r-7

7/3-(2/r)+7 = 0

7/3-2*r^-1+7 = 0

-2*r^-1 = -28/3 // : -2

r^-1 = 14/3

-1 < 0

1/(r^1) = 14/3 // * r^1

1 = 14/3*r^1 // : 14/3

3/14 = r^1

r = 3/14

r = 3/14

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