1) у' = - 1/x²
y' = -1/(√5)² = -1/5
2)
а)y' = -3x²+x -1-3Sinx*(x² +2) + 3Cosx*2x
б) y' = -3Sinx*(x² +2) + 3Cosx*2x
в) y' = -1/√x³
г) y' = -1*(Sinx)^-2 * Cosx = -Cosx/Sin²x
д) y' =( 4x³*(3 - x) - x^4*(-1))/(3 - x)²= (12x³ - 4x⁴ +x⁴)/(3 - х)²=
=(12х³ - 3х⁴)/(3 - х)²
е)y' = 2x - 1/Sin²x