(7r)^-3/2=343

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Solution for (7r)^-3/2=343 equation: 


D( r )

7*r = 0

7*r = 0

7*r = 0

7*r = 0 // : 7

r = 0

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

((7*r)^-3)/2 = 343 // - 343

((7*r)^-3)/2-343 = 0

1/686*r^-3 = 343 // : 1/686

r^-3 = 235298

-3 < 0

1/(r^3) = 235298 // * r^3

1 = 235298*r^3 // : 235298

1/235298 = r^3

r^3 = 1/235298 // ^ 1/3

r = (1/235298)^(1/3)

r = (1/235298)^(1/3)

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