Odpowiedź:
7.
[tex]\frac{x}{2} - \frac{2 - x}{3} \geq \frac{1}{12} / * 12[/tex]
6 x - 4*( 2 - x) ≥ 1
6 x - 8 + 4 x ≥ 1
10 x ≥ 9 / : 10
x ≥ 0,9
===========
8.
( x - [tex]\frac{1}{2})^2 - ( x - \frac{3}{2} )*(x + \frac{3}{2} ) = 3 x - 1[/tex]
x² - x + [tex]\frac{1}{4} - ( x^2 - (\frac{3}{2} )^2) = 3 x - 1[/tex]
x² - x + [tex]\frac{1}{4} - x^2 + \frac{9}{4} = 3 x - 1[/tex]
- x + [tex]\frac{10}{4}[/tex] = 3 x - 1 / * 4
- 4 x + 10 = 12 x - 4
- 16 x = - 4 - 10
-16 x = - 14 / : ( - 16)
x = [tex]\frac{14}{16} = \frac{7}{8}[/tex]
============
Szczegółowe wyjaśnienie:
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Odpowiedź:
7.
[tex]\frac{x}{2} - \frac{2 - x}{3} \geq \frac{1}{12} / * 12[/tex]
6 x - 4*( 2 - x) ≥ 1
6 x - 8 + 4 x ≥ 1
10 x ≥ 9 / : 10
x ≥ 0,9
===========
8.
( x - [tex]\frac{1}{2})^2 - ( x - \frac{3}{2} )*(x + \frac{3}{2} ) = 3 x - 1[/tex]
x² - x + [tex]\frac{1}{4} - ( x^2 - (\frac{3}{2} )^2) = 3 x - 1[/tex]
x² - x + [tex]\frac{1}{4} - x^2 + \frac{9}{4} = 3 x - 1[/tex]
- x + [tex]\frac{10}{4}[/tex] = 3 x - 1 / * 4
- 4 x + 10 = 12 x - 4
- 16 x = - 4 - 10
-16 x = - 14 / : ( - 16)
x = [tex]\frac{14}{16} = \frac{7}{8}[/tex]
============
Szczegółowe wyjaśnienie: