22/(х-3)=3/(х-22)
22*(х-22)=3*(х-3)
22х - 484 = 3х - 9
22х - 3х = 484 - 9
19х = 475
х = 475/19
<span>х= 25</span>
Sin²x+cos²x-6сos²x-4sinxcosx-cos²x+sin²x=0/cos²x
2tg²x-4tgx-6=0
tg²x-2tgx-3=0
tgx=a
a²-2a-3=0
a1+a2=2 U a1*a2=-3
a1=-1⇒tgx=-1⇒x=-π/4+πn,n∈z
a2=3⇒tgx=3⇒x=arctg3+πk,k∈z
Решение f(x) = cos^2(x) - cos(x)
к=(у2-у1)/(х2-х1)=(0-1)/(19-0)=-1/19
l x-2011 l + l 2011-x l = 2012