Posted by **Calculus** on Sunday, February 10, 2013 at 11:31pm.

Let f(x)=3x^3 +7.5x +1. In this problem you will estimate f'(3) by computing the average rate of change of f(x)over a small interval. Round your answers to three decimal places.

First choose the interval of length .1 with 3 being the left endpoint of

the interval.

Then f'(3)≈ ______

Now let the interval have length .01. Then f'(3)≈ _______

Finally let the interval have length .001

Then f'(3)≈

**I am genuinely lost on where to even begin with this problem. I understood the rest of my homework completely, except this one. My homework will be due before someone can get to answer this, I am almost sure of that, so please - just work it out for me so that I can better understand it for the midterm.

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