Shade T.
asked • 09/08/24Derivatives Help
Determine the derivative of f(x)=cos(x+1/x).
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1 Expert Answer
You can use the chain rule, assuming u= x+1/x
df/dx = (df/du)(du/dx) = (-sin u)(1-1/x2) = (1/x2 -1) sin (x+1/x)
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Doug C.
There is a chance that the post intended cos[(x+1)/x]?09/08/24