21/5/x

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Solution for 21/5/x equation: 


D( x )

x = 0

x = 0

x = 0

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

(21/5)/x = 0

21/5*x^-1 = 0 // : 21/5

x^-1 = 0

x należy do O

x belongs to the empty set

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