Respuesta :

(2 / x-1)> (7 / x + 1)
 For this case we can solve the problem graphically.
 The solution will be the shaded region.
 Note: see attached image.
 Answer:
 The solution is given by:1 <x <9/5
Ver imagen carlosego

Answer:

Given inequality,

[tex]\frac{2}{x} - 1 > \frac{7}{x} + 1[/tex]

Using the property a > b ⇒ a + c > b + c ∀ a, b, c ∈ R

[tex]\frac{2}{x} > \frac{7}{x}+2[/tex]

Using the property a > b ⇒ a - c > b - c ∀ a, b, c ∈ R

[tex]\frac{2}{x}-\frac{7}{x} > 2[/tex]

[tex]\frac{2-7}{x} > 2[/tex]

[tex]-\frac{5}{x} > 2[/tex]

Case 1 : If x > 0 ⇒ -x < 0

∵ a > b ⇒ ca < cb if c < 0,

[tex]\implies 5 < -2x[/tex]

Now, -1/2 < 0

[tex]\implies -\frac{5}{2} > x[/tex]

Case 2 : If x < 0 ⇒ -x > 0

∵ a > b ⇒ ca > cb if c > 0,

[tex]\implies 5 > -2x[/tex]

Now, -1/2 < 0

[tex]\implies -\frac{5}{2} < x[/tex]