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Sagot :

a) [tex]\frac{1}{x}[/tex]=2 ⇔ x=[tex]\frac{1}{2}[/tex]

b)[tex]\frac{1}{x}[/tex]=-5 ⇔ x=[tex]\frac{-1}{5}[/tex]

c)[tex]\frac{1}{x} =\frac{5}{3}[/tex] ⇔ 5x=3⇔x=[tex]\frac{3}{5}[/tex]

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