4/(3-3r2)

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Solution for 4/(3-3r2) equation: 


D( r )

3-(3*r^2) = 0

3-(3*r^2) = 0

3-(3*r^2) = 0

3-3*r^2 = 0

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

r^2 = 1

r^2 = 1 // ^ 1/2

abs(r) = 1

r = 1 or r = -1

r in (-oo:-1) U (-1:1) U (1:+oo)

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

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

r belongs to the empty set

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