first line should be L(x) = f(a) + f'(a)(x-a) ... other than that, looks fine to me. I do not attempt to understand the inner workings of online answering systems.
I must be losing my mind because I've been over and over this one and can't see what I am doing wrong:
Find the linearization L(x) of the function at
Here is what I have done:
And that's my answer. But when I plug it into the web site, it gets kicked back as incorrect. Can anybody see my mistake? I can't!