3/c-4/7

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Solution for 3/c-4/7 equation: 


D( c )

c = 0

c = 0

c = 0

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

3/c-(4/7) = 0

3/c-4/7 = 0

3*c^-1 = 4/7 // : 3

c^-1 = 4/21

-1 < 0

1/(c^1) = 4/21 // * c^1

1 = 4/21*c^1 // : 4/21

21/4 = c^1

c = 21/4

c = 21/4

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