7/v-4/v=15

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Solution for 7/v-4/v=15 equation: 


D( v )

v = 0

v = 0

v = 0

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

7/v-(4/v) = 15 // - 15

7/v-(4/v)-15 = 0

7/v-4*v^-1-15 = 0

3*v^-1 = 15 // : 3

v^-1 = 5

-1 < 0

1/(v^1) = 5 // * v^1

1 = 5*v^1 // : 5

1/5 = v^1

v = 1/5

v = 1/5

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