1/r8=1/15

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Solution for 1/r8=1/15 equation: 


D( r )

r^8 = 0

r^8 = 0

r^8 = 0

1*r^8 = 0 // : 1

r^8 = 0

r = 0

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

1/(r^8) = 1/15 // - 1/15

1/(r^8)-(1/15) = 0

1/(r^8)-1/15 = 0

1*r^-8 = 1/15 // : 1

r^-8 = 1/15

-8 < 0

1/(r^8) = 1/15 // * r^8

1 = 1/15*r^8 // : 1/15

15 = r^8

r^8 = 15 // ^ 1/8

abs(r) = 15^(1/8)

r = 15^(1/8) or r = -15^(1/8)

r in { 15^(1/8), -15^(1/8) }

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