2*(2+2^1/2)
---------------------------=
(2-2^1/2)(2+2^1/2)
2((2+2^1/2)
--------------------------- =
2^2 -(2^1/2)^2
2(2+2^1/2)
----------------------------- =
4-2
=. 2(2+2^1/2)
---------------- =
2
= 2+2^1/2
Ответ: с
4-4a+a^2=а^2-9
-4a= -13
a= 13/4
a=31/4
Ответ: с
Х+5>=0. Х>= -5
{Х-1>=0. { Х>= 1
////////////////////////
-----(-5)-------(1)------------
\\\\\\\\\\\\\\
Х>= 1
[1; + беск)
Ответ:с
f(X)=2x-8
f(3)=2*3 -8=6-8= -2
Ответ: д