Question

решите неравенство!!!!!

Answer 1

Ответ:

5^x = t

t²+4t-5≥0

D = 16 + 20= √36 = 6

t1,2= (-4±6)/2= 1; -5

5^x = 1

x1 = 0

5^x = -5

x2 € R

[0;+∞) - Ответ