Find the derivative of the function using the definition of derivative.

1) x + sqrt(x)

2) 1 / sqrt(x)

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1) ((x+h) + sqrt(x+h) - [x + sqrt(x)])/h

I'm stuck here, not sure what to do?

2) [(1/sqrt(x+h)) - (1/sqrt(x))]/h

Not sure what to do here either?