2/7=4/s

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Solution for 2/7=4/s equation: 


D( s )

s = 0

s = 0

s = 0

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

2/7 = 4/s // - 4/s

2/7-(4/s) = 0

2/7-4*s^-1 = 0

-4*s^-1 = -2/7 // : -4

s^-1 = 1/14

-1 < 0

1/(s^1) = 1/14 // * s^1

1 = 1/14*s^1 // : 1/14

14 = s^1

s = 14

s = 14

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