1-(20/a)=11

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Solution for 1-(20/a)=11 equation: 


D( a )

a = 0

a = 0

a = 0

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

1-(20/a) = 11 // - 11

1-(20/a)-11 = 0

1-20*a^-1-11 = 0

-20*a^-1 = 10 // : -20

a^-1 = -1/2

-1 < 0

1/(a^1) = -1/2 // * a^1

1 = -1/2*a^1 // : -1/2

-2 = a^1

a = -2

a = -2

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