1/4=b^-2

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Solution for 1/4=b^-2 equation: 


D( b )

b = 0

b = 0

b = 0

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

1/4 = b^-2 // - b^-2

1/4-b^-2 = 0

-1*b^-2 = -1/4 // : -1

b^-2 = 1/4

-2 < 0

1/(b^2) = 1/4 // * b^2

1 = 1/4*b^2 // : 1/4

4 = b^2

b^2 = 4 // ^ 1/2

abs(b) = 2

b = 2 or b = -2

b in { 2, -2 }

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