Помогите срочно!!!!!

1). 2^(2x - 1) - 7*2^(x - 1) + 5 0
1/2*2^(2x) - 7/2 *2^x + 5 0
2^x = t
1/2t - 7/2t + 5 0 *2
t - 7t + 10 0
t - 2t - 5t + 10 0
t(t - 2) - 5(t - 2) 0
(t - 2)(t - 5) 0
t = 2^x
(2^x - 2)(2^x - 5) 0
2^x - 2 = 0 x = 1
2^x - 5 = 0 x = log5
_+__1__-___log5__+__gt;
x[1 ; log5]

2). logx + 5logx + 6 gt; 0
ОДЗ: x gt; 0
logx = t
t + 5t + 6 gt; 0
t + 2t + 3t + 6 gt; 0
t(t + 2) + 3(t + 2) gt; 0
(t + 2)(t + 3) gt;0
t = logx
(logx + 2)(logx + 3) gt; 0
logx + 2 = 0 x = 1/4
logx + 3 = 0 x = 1/8
__+__(1/8)__-___(1/4)__+___
x(0; 1/8)(1/4; )