8/7=4/v

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Solution for 8/7=4/v equation: 


D( v )

v = 0

v = 0

v = 0

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

8/7 = 4/v // - 4/v

8/7-(4/v) = 0

8/7-4*v^-1 = 0

-4*v^-1 = -8/7 // : -4

v^-1 = 2/7

-1 < 0

1/(v^1) = 2/7 // * v^1

1 = 2/7*v^1 // : 2/7

7/2 = v^1

v = 7/2

v = 7/2

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