50^х - 3×10^х-20^х+3×4^х >=0

Question

50^х - 3×10^х-20^х+3×4^х >=0

Comments

можно больше баллов?

Answer 1

10^x(5-3) - 4^x(5-3)>0
(10^x-4^x)(5-3)>0
2(10^x-4^x)>0
10^x>4^x
(0;+∞)