1/r=1/9+1/16

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Solution for 1/r=1/9+1/16 equation: 


D( r )

r = 0

r = 0

r = 0

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

1/r = 1/9+1/16 // - 1/9+1/16

1/r-(1/9)-(1/16) = 0

1/r-1/9-1/16 = 0

1*r^-1 = 25/144 // : 1

r^-1 = 25/144

-1 < 0

1/(r^1) = 25/144 // * r^1

1 = 25/144*r^1 // : 25/144

144/25 = r^1

r = 144/25

r = 144/25

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