18a^-2/9a^7

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Solution for 18a^-2/9a^7 equation: 


D( a )

a = 0

a = 0

a = 0

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

((18*a^-2)/9)*a^7 = 0

2*a^5 = 0 // : 2

a^5 = 0

a = 0

a in { 0} 

a belongs to the empty set

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