November 3rd, 2010, 10:31 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^46/ 6t^3 =6t^36t+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, 10:45 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, 11:31 PM  #3  
Senior Member Joined: Oct 2010 From: Changchun, China Posts: 492 Thanks: 14  Re: Questions in derivatives Quote:
Is it ? first derivative 2) Is it ? 3) Is it ? , so the derivative is 0....  

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