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[Guest]

Use the product rule to find the derivative.

f(x) = (4x - 3)(sqrt of x + 5)

I did it like my book shows and I got f'(x) = 6x^1/2 - 3x^-1/2 + 20 did I do it right?

 

[tkhunny]

No one can tell.

Is that \(\displaystyle \sqrt{x}+5\) or \(\displaystyle \sqrt{x+5}\)?

With just your final answer, only you know if you used the "Product Rule".