Find the derivative of the function f(x)=-3(2-9x)^(1/4)

[Cafe au lait]

Find the derivative of the function f(x)=-3(2-9x)^(1/4)

I have:

f'(x)=-3[1/4(2-9x)(-9)]+0(2-9x)^(1/4)
=-3[-9/4(2-9x)]
=-3(81/4x-9/2)
=-243/4x+27/2

Did I do that right?

[nona.m.nona]

Find the derivative of the function f(x)=-3(2-9x)^(1/4)

I have:

f'(x)=-3[1/4(2-9x)(-9)]+0(2-9x)^(1/4)

When you took the 1/4 power down front, what should have been left behind as the power on the parenthetical?

[Cafe au lait]

Lol I redid it without the product rule and that made it a lot easier! I know I got it right now, thanks!