Homework Help Forum: maths

Posted by Amelia on Saturday, November 7, 2009 at 9:25am.

differentiate using product, chain and quotient rule ln x / 5x-7 and e^x / 2x^3 - 1 could you help me out with the first and just point me in the right direction for the first i cant seem to get the steps in the right order and then it gets all muddled thank you A!

• maths - bobpursley, Saturday, November 7, 2009 at 10:08am

  let u= e^x v=(5x-7) du/dx=e^x dv/dx= 5 f= uv^-1 f'= u d(v^-1)/dx+ v^-1 du/dx f'= -uv^-2 dv/dx + v^-1 e^x so... f'=-5e^x/(5x-7)^2+ e^x/(5x-7 check that.

  
  

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