Question

решите двйное неравенство

 

-2 < числитель (4х-1),знаменатель(5)<2  

 

Answer 1

х больше -2,25,но х меньше 2,75

Answer 2

-2 < (4х-1)/5                               (4х-1)/5 < 2 

-10 < 4х-1                                    4х-1 < 10

-10+1 < 4х                                   4х < 10+1

-9 < 4х                                         4х < 11 

-9/4 < х                                       х < 11/4

-2,25 < x                                      x < 2,75

                   -2,25 < x < 2,75