Задача 19130 ...

u19416024413

06.11.2017

1) x² - 9x + 20 ≥ 0

2) x - 2 > 0

3) log (x - 2) ≥ 0

slava191

06.11.2017

★

1) x^2-9x+20 = 0

D = 81 - 4*20 = 1

x1,x2 = (9+/-1)/2 = 5 и 4

2) x > 2

3) x-2 > = 1

x > = 3