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gjhfdfg

  • one year ago

Find the derivative of f at x.

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  1. gjhfdfg
    • one year ago
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    f(x) = 7x + 8; x = 5

  2. gjhfdfg
    • one year ago
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    Is it 35? I feel like this is to easy & I'm just not seeing it.

  3. darth
    • one year ago
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    7(5)+8 =43

  4. darth
    • one year ago
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    simple subt.

  5. Hoa
    • one year ago
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    @darth take "derivative"

  6. jamesHayek
    • one year ago
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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.

  7. gjhfdfg
    • one year ago
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    43 isnt one of the answer choices

  8. jamesHayek
    • one year ago
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    What are your choices?

  9. Hoa
    • one year ago
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    7?

  10. gjhfdfg
    • one year ago
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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.

  11. gjhfdfg
    • one year ago
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    A. 40 B. 8 C. 35 D. 7

  12. Hoa
    • one year ago
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    D.

  13. jamesHayek
    • one year ago
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    7

  14. darth
    • one year ago
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    i's 7.

  15. Hoa
    • one year ago
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    @darth better

  16. jamesHayek
    • one year ago
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    Then asked for the derivative of f(x), I belvie the question is worded wrong.

  17. darth
    • one year ago
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    but what does the x=5 has to do with it?

  18. gjhfdfg
    • one year ago
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    I don;t know, I didnt type the question.

  19. Hoa
    • one year ago
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    nothing! the derivative of f doesn't depend on x. that what it means

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