Y ' = ( ln x^3) ' = (x^3)' /x^3 = 3x^2/x^3 = 3/x
4.8у+5.2-2.4у+9.2=0
2.4у+14.4=0
2.4у=-14.4
у=6
1=cos²x+sin²x
cos2x=cos²x-sin²x cost описка?
cos²x + sin²x+ cos x+cos²x - sin²x=
2cos²x+ cosx=0
cosx(2cosx+1)=0 если
cosx= 0 x=π/2+πr. И
2cosx+1 cosx=-1/2 x=+_2π/3+2πr