Question

derivative of y=x/sqrt(x^4+4)

Answer 1

use division rule. divison rule: if you have y=a/b. y'=(a'b-ab')/(b^2)

Answer 2

so just plug in whatever u have for a and b. a for you is x. b for you is sqrt(x^4+4)

Answer 3

it's called "quotient rule", not "division rule", actually.