2/c-7/9

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Solution for 2/c-7/9 equation: 


D( c )

c = 0

c = 0

c = 0

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

2/c-(7/9) = 0

2/c-7/9 = 0

2*c^-1 = 7/9 // : 2

c^-1 = 7/18

-1 < 0

1/(c^1) = 7/18 // * c^1

1 = 7/18*c^1 // : 7/18

18/7 = c^1

c = 18/7

c = 18/7

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