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February 1st, 2014, 07:32 AM  #1 
Member Joined: Sep 2013 Posts: 75 Thanks: 0  indices; changing to exponential form
y = 2x + 1/sqr rt (x) This is how I tackled it; 2x/sqr rt (x) + 1/sqr rt (x) 2x.x ^1/2 + x^1/2 
February 1st, 2014, 05:31 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 19,291 Thanks: 1683  ? If so, and x > 0, you can take a further step to get 

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