Sagot :
Bonsoir
1/ x = 9
9 x = 1
x = 1 /9
1 /x = 6/11
6 x = 11
x = 11/6
1 /x = - 5
- 5 x = 1
x = - 1/5
1 /x - 4 /7 = 0
1 / x = 4 /7
4 x = 7
x = 7/4
Bonsoir,
[tex]\frac{1}{x}=9[/tex] ⇔ 9x = 1 ⇔ [tex]x=\frac{1}{9}[/tex]
1/x= -1/x ⇔ x = -x ⇔ 2x = 0 ⇔ x = 0
[tex]\frac{1}{x}=\frac{6}{11}[/tex] ⇔ [tex]x = \frac{11}{6}[/tex]
[tex]\frac{1}{x}=-5[/tex] ⇔ [tex]x=-\frac{1}{5}[/tex]
[tex]\frac{1}{x}-\frac{4}{7}=0[/tex] ⇔ [tex]\frac{1}{x} = \frac{4}{7}[/tex] ⇔ [tex]x=\frac{7}{4}[/tex]
Bonne soirée