1. Not finding help here? Sign up for a free 30min 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!

Calculus Problem with simplifying

  1. Nov 22, 2004 #1
    well ill go through the whole question up to where i am (not very far) to make sure there were no prior errors, but i cant simplfy past where i am (maybe i just cant see it)

    Differentiate and simplify

    .........(1-x)^4
    f(x) = --------
    ...........1-4x

    f'(x) = [4(1-x)^3(-1)](1-4x) - (1-x)^4(-4)
    .........-----------------------------------
    ..........................(1-4x)^2

    ......= (-4)(1-x)^3 - (1-x)^4(-4)
    .........------------------------- note: i cancelled the (1-4x) on top
    .....................(1-4x) with one from the bottom


    ......= stuck (i tried common factoring on top but still cant get it)

    any help will be GREATLY appreciated (last question on assignmentand driving me crazy)

    sorry bout the formating, cant seem to get it right (hence the periods)
     
    Last edited: Nov 22, 2004
  2. jcsd
  3. Nov 22, 2004 #2
    how'd you cancel out the (1-4x) from the top and bottom? (1-x)^4*-4 doesn't have (1-4x) as a common factor with the denominator. My personal suggestion (although lengthy to an extent) would be to expand all the numerator and see if it's divisible by 1-4x.
     
  4. Nov 22, 2004 #3

    BobG

    User Avatar
    Science Advisor
    Homework Helper

    You can't cancel out the (1-4x) because it only appears on the left side of the numerator and not on the right. I don't see that much that's easily simplified (if you expanded the numerator so you could do the subtraction, it might simplify, but I doubt it).
     
  5. Nov 22, 2004 #4
    Hrm I haven't really tried anything with it but see what happens when you factor out (1-x)^3 from the top from the left and right operands of the middle - sign.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Calculus Problem with simplifying
  1. Calculus Problem (Replies: 2)

  2. Calculus problem (Replies: 1)

  3. Calculus problem (Replies: 11)

  4. Calculus Problem (Replies: 2)

Loading...