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Properties of the derivative with Vectors.

I got these wrong on my homework and unfortunately it doesnt give me the answers. Can someone give me the correct answers because i need to know how to do this and whats the point of trying to work them out if i dont know the answers?! :) This is an online class and the professor has ZERO communication with us. Thanks!

Also i understand this is a lot of work to show here so im not asking how to figure them out just the answers to i can then figure them out. :)

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Re: Properties of the derivative with Vectors.

(a) and (b) have green checks by them indicating they are correct. Where did that come from if your website does not tell you if your answer are correct or not.

In any case, you are welcome to go ahead and post **your** solutions here and we will tell you whether they are correct or not. That will help you a lot more than just being given the answers.

Re: Properties of the derivative with Vectors.

Well this was a quiz. So i get two chances to answer and if you get it wrong it just greys it out. You get a green mark if you get it right but you arent told the answers and the professor does not write back. I suppose because each quiz is different and there too many variations of this question to write back everyone.

Well maybe you can answer this first. Do i perform the the inner operation first and then get the derivative?

Re: Properties of the derivative with Vectors.

Yes that is exactly what you do.

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Re: Properties of the derivative with Vectors.

here is my work for part (d) it was wrong. But i dont know where. Can someone check it. Thanks.