1) (b-1)^2
2) (2+n)^2
3) (x-7)^2
4) (2a+b)^2
5) (3х-4y)^2
6) (a^3-1)^2
7) (6a^3-7b^5)^2
8) -
Во вложении..............................
(5^2х25^2)/5^8 = (5^2х5^3)/5^8 = 5^8/5^8 = 1
2*(сos^2x) - sin(3π/2 + x) = 0
2*(сos^2x) - cosx = 0
cosx(2cosx - 1) = 0
1) cosx = 0
x1 = π/2 + πn, n∈Z
2) cosx = 1/2
x = (+ -)arccos(1/2) + 2πk, k∈Z
x2 = (+ -)(π/3) + 2πk, k∈Z
Область определения все числа(-беск;+беск),а область значений [-12,25; +беск)