, найти производные функции

А) y = 2x^3 - 3
f ` (x) = (2x^3 - 3) ` = (2x^3) ` - (3) ` = 2 × (x^3) ` - (3) ` = 2 × 3 × x^3-1 - 0 = 6x^2

б) y = 7 - 3/x^2
f ` (x) = (7 - 3/x^2) ` = (7) ` - 3 × (x^-2) ` = 0 + 6x^-3 = 6x^-3 = 6/x^3