Sin(3*pi*x/2)=x^2+2x+2=(x+1)^2+1
-1<=sin(3*pi*x/2)<=1<br>(x+1)^2+1>=1
sin(3*pi*x/2)=x^2+2x+2 => sin(3*pi*x/2)=x^2+2x+2 =1
x^2+2x+2 =1 и sin(3*pi*x/2)=1
(x+1)^2+1 =1 и 3*pi*x/2=pi/2+2*pi*k
x =- 1 и 3*x=1+4*k
x =- 1 и -3=1+4*k
x =- 1 и к=-1
ответ х = -1