gjhfdfg
Find the derivative of f at x.
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gjhfdfg
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f(x) = 7x + 8; x = 5
gjhfdfg
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Is it 35? I feel like this is to easy & I'm just not seeing it.
darth
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7(5)+8 =43
darth
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simple subt.
Hoa
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@darth take "derivative"
jamesHayek
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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.
gjhfdfg
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43 isnt one of the answer choices
jamesHayek
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What are your choices?
Hoa
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7?
gjhfdfg
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I did the same thing first, I plugged then 5 in then solved it & got 43 but then it wasnt one of my choices.
gjhfdfg
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A. 40
B. 8
C. 35
D. 7
Hoa
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D.
jamesHayek
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7
darth
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i's 7.
Hoa
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@darth better
jamesHayek
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Then asked for the derivative of f(x), I belvie the question is worded wrong.
darth
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but what does the x=5 has to do with it?
gjhfdfg
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I don;t know, I didnt type the question.
Hoa
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nothing! the derivative of f doesn't depend on x. that what it means