1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Trying to understand the question: Find dy/dx

  1. Mar 3, 2009 #1

    Question asks: Find dy/dx. Do not simplify.

    y = sec(cube root x)

    My answer is

    dy/dx = sec(cube root x) * tan(cube root x)

    Am I correct?

  2. jcsd
  3. Mar 3, 2009 #2
    Hello ugeous. You are VERY close. Remember the chain rule? Our inside angle for sec in y = sec (cube root x) is cube root x. you must take the derivative of this "inside angle" to complete the problem correctly.
  4. Mar 3, 2009 #3
    Oh, right!

    sec(cube root x) * tan(cube root x) * 1/3(x^-2/3)

    Is this correct?
  5. Mar 3, 2009 #4
    You betcha :)
  6. Mar 3, 2009 #5
    Thanks man!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook