log2(x+5)=log2(3x-1)+log2(x-1)
1) f'(x)*g'(x) = 0
x = 2
2)
3)
4) g(x) = 4sinx
g'(x) = 4cosx
60,8----100%
х--------25%
х=15,2
60,8+15,2=76
76*23=1748ц
Ответ:1748ц