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 November 3rd, 2010, 09:31 PM #1 Senior Member   Joined: Oct 2009 Posts: 895 Thanks: 1 Questions in derivatives Hi all 1 ) Finf the frisr derivative of y (t^2 + 2/6t)(t^4 - 3 /t^3) my answer : y = t^6 - 3t^2 + 2t^4-6/ 6t^3 =6t^3-6t+t^-3 first derivative 18 - 6 + -3t --------- 2 ) tan(2 + cos3x) derivative = sex^2x =sex2xsin3x 3)sex2x.cos2x derivative = cos2x.-sin2x now appy proudcur rule ? November 3rd, 2010, 09:45 PM #2 Senior Member   Joined: Oct 2010 From: Changchun, China Posts: 492 Thanks: 14 Re: Questions in derivatives Oops....translation of your maths language is such an amazing thing!  November 3rd, 2010, 10:31 PM   #3
Senior Member

Joined: Oct 2010
From: Changchun, China

Posts: 492
Thanks: 14

Re: Questions in derivatives

Quote:
 Originally Posted by r-soy Hi all 1 ) Finf the frisr derivative of y (t^2 + 2/6t)(t^4 - 3 /t^3) my answer : y = t^6 - 3t^2 + 2t^4-6/ 6t^3 =6t^3-6t+t^-3 first derivative 18 - 6 + -3t --------- 2 ) tan(2 + cos3x) derivative = censored^2x =sex2xsin3x 3)sex2x.cos2x derivative = cos2x.-sin2x now appy proudcur rule ?
1)

Is it ?

first derivative

2)

Is it ?

3)

Is it ?

,

so the derivative is 0.... Tags derivatives, questions Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post johngalt47 Calculus 2 November 23rd, 2013 11:44 AM jkh1919 Calculus 9 October 6th, 2012 03:21 PM r-soy Calculus 3 November 28th, 2010 11:31 AM r-soy Calculus 3 November 4th, 2010 02:42 PM r-soy Calculus 2 November 3rd, 2010 09:25 PM

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