1/18.7=4.5/f

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Solution for 1/18.7=4.5/f equation: 


D( f )

f = 0

f = 0

f = 0

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

1/18.7 = 4.5/f // - 4.5/f

1/18.7-(4.5/f) = 0

1/18.7-4.5*f^-1 = 0

-4.5*f^-1 = -0.05347594 // : -4.5

f^-1 = 0.01188354

-1 < 0

1/(f^1) = 0.01188354 // * f^1

1 = 0.01188354*f^1 // : 0.01188354

84.15000917 = f^1

f = 84.15000917

f = 84.15000917

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