A) x1=7; x2=-7;
б) x1=кор(13); x2=-кор(13);
в) кор(x)=-3; x- нет корней;
г) x=2,2^2=4,84;
6000:100*9+6000=6540
6540:100*9+6540=7128,6
ответ на фото\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
Tga=f`(x0)
f`(x)=(1-9x²)/(3x³-x)²
f`(2)=(1-36)/(24-2)²=-35/484
tga=-35/484
14*0,81*0,36=4.0824.......................