21^x/7^x

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Solution for 21^x/7^x equation: 


D( x )

7^x = 0

7^x = 0

7^x = 0

x należy do O

x in (-oo:+oo)

(21^x)/(7^x) = 0

(21^x)/(7^x) = 0 // * 7^x

21^x = 0

x należy do O

x belongs to the empty set

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