Question

d/dx (3x^4-3x)/(3x^4+3x)

Answer 1

the quotient rule is
d/dx(u/v)=(u'v-v'u)/v^2
here we have
u=(3x^4-3x)
v=(3x^4+3x)
find u' and v' and plug them into the formula

Answer 2

12x^3-3 = u' and 12x^3+3 = v"

Answer 3

perfect, but it's just v' not v''
now plug into the formula for the product rule and simplify

Answer 4

i meant v' lol