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Find the derivative of f at x.

Mathematics
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f(x) = 7x + 8; x = 5
Is it 35? I feel like this is to easy & I'm just not seeing it.
7(5)+8 =43

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Other answers:

simple subt.
@darth take "derivative"
Are you asked to take a limit? if f(x)=7x+8 then f(x)'=7 If you plug in your value of "5" and take the derivative you get 0. I don't fully understand your question.
43 isnt one of the answer choices
What are your choices?
7?
I did the same thing first, I plugged then 5 in then solved it & got 43 but then it wasnt one of my choices.
A. 40 B. 8 C. 35 D. 7
D.
7
i's 7.
@darth better
Then asked for the derivative of f(x), I belvie the question is worded wrong.
but what does the x=5 has to do with it?
I don;t know, I didnt type the question.
nothing! the derivative of f doesn't depend on x. that what it means

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