<span>s=5t^4-4t^3+6t
v=</span>s⁾=(5t^4-4t^3+6t )⁾=20t³-12t²+6
v(2)=20*2³-12*2²+6=160-48+6=118
a=v⁾=(20t³-12t²+6)⁾=60t²-24t
a(2)=60*2²-24*2=240-48=192
A)6x(5y+x)-y(5y+x)=30xy+6
-5y^{2} [/tex]+yx=31yx+6
-5y^{2} [/tex]
Ax-b+bx-a=a(x-1)+b(x-1)=(x-1)(a+b)
2) cos a*cos b-sin a*sin b=cos(a+b)
cos(19°30'+25°30')=cos 45°=√2/2
3) cos a*cos b+sin a*sin b=cos(a-b)
cos(8Π/7-Π/7)=cos Π=-1
Решение задания приложено