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http://prntscr.com/ndz1b1

 Apr 19, 2019
 #1
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s  =  [ u^2 + v^2]  / [ 2uv]  =  [ u^2 + v^2] [ 2uv]^(-1)

 

ds/ du     [ Here...we treat  v as a constant]....so  we have [  using the product and chain rules ]

 

[ 2u + v^2] [ 2uv]^(-1)   - (2v)  [ u^2 + v^2] [ 2uv]^(-2)  

 

Similarly

 

ds /dv  [ we treat u as a constant ]

 

[ u^2 + 2v] [ 2uv]^(-1) - (2u) [ u^2 + v^2] [ 2uv]^(-2)

 

 

cool cool cool

 Apr 19, 2019
 #2
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so is that weird symbol a d?

 Apr 19, 2019
 #3
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 a derivative ?

 Apr 19, 2019

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