Найдите производную функции y=2x^3-x^2/2+4 y=2cosx-3tgx y=(x-3)/(x+2)

1 ) y = 2 * x ^ 3 - x ^ 2 / 2 + 4 ; Производная у = ( у ) \' = ( 2 * x ^ 3 - x ^ 2 / 2 + 4 ) \' = 2 * 3 * x ^ 2- 1 / 2 * 2 * x + 0 = 6 * x ^ 2 - x ;2 ) y = 2 * cos x - 3 * tgx ; Производная у = ( у ) \' = ( 2 * cos x - 3 * tgx ) \' = 2 * ( - sin x ) - 3 * 1 / cos ^ 2 x = - 2 * sin x - 3 / cos ^ 2 x ;3 ) y = ( x - 3 ) / ( x + 2 ) ;Производная у = ( у ) \' = ( ( x - 3 ) \' * ( x + 2 ) - ( x - 3 ) * ( x + 2 ) \' ) / ( x + 2 ) ^ 2 = ( ( x \' - 3 \' ) * ( x + 2 ) - ( x - 3 ) * ( x \' + 2 \' ) ) / ( x + 2 ) ^ 2 = ( ( 1 - 0) * ( x + 2 ) - ( x - 3 ) * ( 1 + 0 ) ) / ( x + 2 ) ^ 2 = ( x + 2 - ( x - 3 ) ) / ( x + 2 ) ^ 2 = ( x + 2 - x + 3 ) / ( x + 2 ) ^ 2 = 5 / ( x + 2 ) ^ 2.