Resoudre

Question

Résoudre dans \(\mathbf{R}\):

a. \(\frac{1}{x}\)\(\)=-3 S =

Solution

\(S=-\frac{1}{3}\)

Question

b.\(\frac{1}{x}\)\(\)≥2 S =

Solution

\(S=]0 ;\frac{1}{2}]\)

Question

c.\(\frac{1}{x}\)\(\)≤1 S =

Solution

\(S=]-\infty ;0[\cup[1 ;+\infty[\)