Find the derivative of f(x) = 3x + 8 at x = 4.

Question

anonymous · Answer

easy :D


what is derivitive or 3x?

anonymous · Answer

*of

anonymous · Answer

I don't understand what to do. Would I be substituting 4 for x in 3x?

anonymous · Answer

3x + 8

1st    you can break up  polynomials into pards

D(3x)   +   D(8)  

2nd     

D(8)   derivative of a constant is 0.

3rd 

D(3x)    =  3      I think it is the powers rule


the answer is just 3   a straight line  

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So at 4  

the answer is 3 as well

anonymous · Answer

Derivitive is 3 everywhere infact

anonymous · Answer

Can you help me with one that's in fraction form?

anonymous · Answer

sure

anonymous · Answer

Find the derivative of f(x) = 5/x at x = -1.

So first I have to do what again?

anonymous · Answer

5/x   is the same as

5* 1/x     which is the same as

5*x^(-x)
I'll do pic hold on

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then use the powers rule

anonymous · Answer

would it be -5?

anonymous · Answer

one step at a time what is |dw:1401999678917:dw|