Finding derivative using a table
I understand this one but the one with 1.1 I'm not sure how to solve. Attached picture of problem.
d/dx[xf(x)] | x=4

d/dx[1.1f(x)] | x=4

Question

Finding derivative using a table
I understand this one but the one with 1.1 I'm not sure how to solve. Attached picture of problem. 
d/dx[xf(x)] | x=4


d/dx[1.1f(x)] | x=4

anonymous · Answer

attachment

anonymous · Answer

Just take the derivative of f(x) and multiply it by 1.1.  You would normally use the product rule to take the derivative, but since 1.1 is a constant, the derivative of a constant times a function is just the constant times the derivative of the function.

anonymous · Answer

so, you are looking for$$1.1f \prime(4)$$

anonymous · Answer

= 4 * 1.1 = 4.4 
I see it now. Thanks!

anonymous · Answer

Careful, the derivative of f @ 4 is not 4, look at the table again!

anonymous · Answer

I think it is 4 on the last picture I attached.

anonymous · Answer

OOps, you are correct.  I was looking at the first picture.

anonymous · Answer

Good job!

anonymous · Answer

Yeah, sorry about that. Glad I understand this simple problem now. THanks once again!

anonymous · Answer

Yeah, sorry about that. Glad I understand this simple problem now. THanks once again!