Y=cos3x
y`=(cos3x)`*(3x)`=-sin3x *3=-3sin3x
cos(2п-t) = cos(-t) = cost
<span>Разложим:
3a^2-6a+3=3*(a-1)^2</span>
Вложение .............................................
Pz+qz+p+q=(p+q)(z+1)
pt+qt+p+q=(p+q)(t+1)
pz+qz+p+q
----------------- =
pt+qt+p+q
(p+q)(z+1)
----------------- =
(p+q)(t+1)
(z+1)
--------- = (25+1)/(12+1)=2
(t+1)