2х² +7х + 3 = 0
D=7²-2*3*4=25=5²
х₁=(-7+5)/4=-0,5
х₂=(-7-5)/4=-3
K=f`(x0)=1-1/2√x=-1
1/2√x=2
4√x=1
√x=1/4
<span>x=1/16</span>
(tg(a+7n)+1)(ctg(-a)+1) (tga+1)(1-ctga) tga-1+1-ctga tga-ctga -(ctga-tga)
-------------------------------- = --------------------- = -------------------- = ------------- = ---------------- =
(tg(-a)+1)(ctga+1) (1-tga)(ctga+1) ctga+1-1-tga ctga-tga (ctga-tga)
= -1