a^2/(4/5-4/a)

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Solution for a^2/(4/5-4/a) equation: 


D( a )

4/5-(4/a) = 0

a = 0

4/5-(4/a) = 0

4/5-(4/a) = 0

4/5-4*a^-1 = 0

-4*a^-1 = -4/5 // : -4

a^-1 = 1/5

-1 < 0

1/(a^1) = 1/5 // * a^1

1 = 1/5*a^1 // : 1/5

5 = a^1

a = 5

a = 0

a = 0

a in (-oo:0) U (0:5) U (5:+oo)

(a^2)/(4/5-(4/a)) = 0

(a^2)/(4/5-4*a^-1) = 0

1*a^2 = 0 // : 1

a^2 = 0

a = 0

a in { 0} 

a belongs to the empty set

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