NEW USER NEED SUM HELP with this calculus prob. Derivative Prob.

hi im jhay from.. phl. civil engr. student .. first time to take calculus..

can u explain to me step by step of finding the derivative of a function **x√(x-1)** using** four step rule** .. big tnx in advance..(Evilgrin)

Re: NEW USER NEED SUM HELP with this calculus prob. Derivative Prob.

I don't know what you mean by the "four step rule". It is a product of two functions, so use the product rule. The second function also needs the use of the chain rule.

Re: NEW USER NEED SUM HELP with this calculus prob. Derivative Prob.

I think these are the four steps that iamjhay is talking about:

1. Write and

2. Compute

3. Simplify

4. Find

We would call it computing the derivative from the definition.

To iamjhay: I think this identity will get you over the difficult part:

If you're still having trouble, show us the work you've done so far and we'll help you with the next step.

- Hollywood