Составить сложные функции: y1=f(g(x)) y2=g(f(x)) a) f(x)=cosx, g(x)=1/(x^2+1) b) f(x)=x^2+x-1, g(x)=ctgx
А) f(x) = Cos x , g(x) = 1/(x² + 1) y1 = f(g(x)) = Cos(1/(x² + 1)) y2= g(f(x)) = 1/(Cos²x + 1) б) f(x) = x² + x - 1, g(x) = Ctg x y1 = f(g(x)) = Ctg²x + Ctg x -1 y2= g(f(x))= Ctg(x² + x -1)