<span>-3/4+361/729=</span>-743/2916
А)(х-90)-75=100
х-90=100+75
х=175+90
х=265
___________
(265-90)-75=100
б)1800+(800-у)=9000
800-у=9000-1800
у-800=7200
у=7200-800
у=8000
_____________
1800+(800-8000)=9000
Lny = lnx^sin(x^3)
ln y = sin(x^3) * lnx
1/y * y' = cos(x^3) * 3x^2 * lnx + sin(x^3)*(1/x)
y' = cos(x^3)*3x^2*lnx+sin(x^3)*(1/x)
2 в 5 степени 2•2•2•2•2=32