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 Given ,y=xlnx then the derivative function is equal to

 Mar 6, 2016
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Find the derivative of the following via implicit differentiation:
d/dx(y) = d/dx(x log(x))
The derivative of y is y'(x):
y'(x) = d/dx(x log(x))
Use the product rule, d/dx(u v) = v ( du)/( dx)+u ( dv)/( dx), where u = x and v = log(x):
y'(x) = log(x) d/dx(x)+x d/dx(log(x))
The derivative of x is 1:
y'(x) = x (d/dx(log(x)))+1 log(x)
The derivative of log(x) is 1/x:
y'(x) = log(x)+1/x x
Simplify the expression:
y'(x) = 1+log(x)
Expand the left hand side:
Answer: |  y'(x) = 1+log(x)

 Mar 6, 2016

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