Question

De rezolvat!!! URGENT Dau funda

Answer 1

Răspuns:

( | x | - 1 ) / 4 - [ ( | x | - 2 ) / 4 + ( 7 - 2 × | x | ) / 5 ] = ( | 5x | - 5 ) / 10 - 7 / 4

= ( | x | - 1 ) / 4 - ( | x | - 2 ) / 4 - ( 7 - 2 × | x | ) / 5 = ( 5 × | x | - 5 ) / 10 - 7 / 4

= ( | x | - 1 ) / 4 - ( | x | - 2 ) / 4 - ( 7 - 2 × | x | ) / 5 = [ 5 × ( | x | - 1 ) ] / 10 - 7 / 4

= ( | x | - 1 ) / 4 - ( | x | - 2 ) / 4 - ( 7 - 2 × | x | ) / 5 = ( | x | - 1 ) / 2 - 7 / 4

= 5 × ( | x | - 1 ) - 5 × ( | x | - 2 ) - 4 × ( 7 - 2 × | x | ) = 10 × ( | x | - 1 ) - 35

= 5 × | x | - 5 - 5 × | x | + 10 - 28 + 8 × | x | = 10 × | x | - 10 - 35

= - 23 + 8 × | x | = 10 × | x | - 45

= 8 × | x | - 10 × | x | = - 45 + 23

= - 2x × | x | = - 22

= | x | = 11

x = 11

x = - 11

x1 = - 11 ; x2 = 11

x ∈ { - 11 , 11 }