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my answer =

 

incorrect apparently...

the answer they want =

 

 

 

but I don't understand what i'm doing wrong?

 

any help is much appreciated,

 

Thankyou

vest4R  May 13, 2017
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1+0 Answers

 #1
avatar+79794 
+3

 

∛ t   -  1 / ∛t        we can write this as

 

t^(1/3)  -  t^(-1/3)       differentiating we have

 

(1/3) t^(-2/3)  +  (1/3)t^(-4/3)       factor out  (1/3)

 

(1/3) [ t^(-2/3) + t^(-4/3) ]  =

 

.333333 [ t^(-.666666) + t^(-1.33333) ] 

 

However.......we can actually express this more compactly as

 

(1/3)t^(-4/3) [ t^(2/3)  + 1 ]

 

 

 

cool cool cool

CPhill  May 13, 2017

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