(3r^2)r-5/r^-2r^3

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Solution for (3r^2)r-5/r^-2r^3 equation: 


D( r )

r = 0

r^-2 = 0

r = 0

r = 0

r^-2 = 0

r^-2 = 0

1*r^-2 = 0 // : 1

r^-2 = 0

r naleu017Cy do O

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

3*r*r^2-((5/(r^-2))*r^3) = 0

3*r*r^2-5*r^5 = 0

3*r^3-5*r^5 = 0

r^3*(3-5*r^2) = 0

-5*r^2 = -3 // : -5

r^2 = 3/5

r^2 = 3/5 // ^ 1/2

abs(r) = (3/5)^(1/2)

r = (3/5)^(1/2) or r = -(3/5)^(1/2)

r^3 = 0

1*r^3 = 0 // : 1

r^3 = 0

r = 0

r in { 0} 

r in { (3/5)^(1/2), -(3/5)^(1/2) }

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