Question

Zadanie w załączniku,

Answer 1

1.

2.

cox=-3/7

cos²+sin²=1

sin²=49/49-9/49

sin=2√10/7  sin=-2√10/7∈(2π,³/₂π)

tg=2√10/7*7/-3=-2√10/3

ctg=-3/7*7/2√10=-3/2√10

3,

y=3-2x-2/x+1

y=-2x+1/x+1

ms.zerowe x=1/2

asymptoty x=-1 y=-2

D=R|{-1}

ZW=R|{-2}

 

Answer 2

zad 1

x^2-2x+7/x+2=2  I*(x+2)

x^2-2x+7=2x+4

x^2-2x+7-2x-4=0

x^2-4x+3=0

a=1  b=-4  c=3

delta=b^2-4ac=16-12=4

x1=-b -pierwiasek z delty/2a=4-2/2=2/2=1

x2=-b+pierwiastek z delty/2a=4+2/2=6/2=3