|/(42c^5)=c|/(42c)
|/(-50c^5)=5c^2|/(-2c)
|/(8/c^4)=2/c * |/2
<span>y = - 3tgx + 6x - 1,5П + 8 на отрезке [-П/3;П/3]
y`=-3/cos</span>²x+6=0
cos²x=1/2
(1+cos2x)/2=1/2
1+cos2x=1
cos2x=0
2x=π/2+πk
x=π/4+πk/2,k∈z
k=-1 x=-π/4∈[-π/3;π/3]
k=0 x=π/4∈[-π/3;π/3]
y(-π/3)=-3*(-√3)-2π-1,5π+8≈5-7,5+8=5,5 наибольшее
y(-π/4)=3-1,5π-1,5π+8≈11-9=2
y(π/4)=-3+1,5π-1,π+8=5
y(π/3)=-3√3+2π-1,5π+8≈4,4
=12√2cos225=12√2cos(180+45)=12√2(-cos45)= -12√2 *<span>√2/2= -12</span>
!!!!!!!!!!!!!!!!!!!!!!!!!
(√a-5)*(√a+5)/(5+√a)=√a-5