91/v=7

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Solution for 91/v=7 equation: 


D( v )

v = 0

v = 0

v = 0

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

91/v = 7 // - 7

91/v-7 = 0

91*v^-1 = 7 // : 91

v^-1 = 1/13

-1 < 0

1/(v^1) = 1/13 // * v^1

1 = 1/13*v^1 // : 1/13

13 = v^1

v = 13

v = 13

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