4r^3(r^4)^3/15(r^3)^-2

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Solution for 4r^3(r^4)^3/15(r^3)^-2 equation: 


D( r )

r^3 = 0

r^3 = 0

r^3 = 0

1*r^3 = 0 // : 1

r^3 = 0

r = 0

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

(r^3)^-2*((4*r^3*(r^4)^3)/15) = 0

4/15*r^9 = 0 // : 4/15

r^9 = 0

r = 0

r in { 0} 

r belongs to the empty set

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