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precal

  • 4 years ago

Let F=f+g and G=3f-g find F'(1)

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  1. Akshay_Budhkar
    • 4 years ago
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    Do u have f and g given?

  2. precal
    • 4 years ago
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    I have a graph, would you like me to upload it?

  3. Akshay_Budhkar
    • 4 years ago
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    yea sure i will have a look at it

  4. precal
    • 4 years ago
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    Ok, give me a minute I have to scan it.

  5. anonymous
    • 4 years ago
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    Akshay had a good eyes :P

  6. precal
    • 4 years ago
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  7. precal
    • 4 years ago
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    Thanks for waiting. I think F ' = f ' + g ' G ' = 3f ' - g' not sure about G '

  8. precal
    • 4 years ago
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    I am not sure what to do with F=f+g

  9. anonymous
    • 4 years ago
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    This is the hard way: Use interpolation to find the value of f(x) and g(x) in polynomial form and then use the derivatives.

  10. precal
    • 4 years ago
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    sorry not sure how to do that. Interpolation?

  11. Akshay_Budhkar
    • 4 years ago
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    @Fool o_O??? What is the easy way? I would go for finding f and g as a general function ( it is a line) and add the general equations then differentiate and the substitute 1

  12. precal
    • 4 years ago
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    ok let me write the equations

  13. precal
    • 4 years ago
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    so, I only need the equation where x=1 so f(x)=-3x+10 now let me do g(x)

  14. precal
    • 4 years ago
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    g(x) is x+1 F=f+g F=-3x+10+x+1 F=-2x+11 F'=-2 F'(1) = -2 correct?

  15. precal
    • 4 years ago
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    yes, I am right. Lookedin the back of my book. Thanks for your help

  16. Akshay_Budhkar
    • 4 years ago
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    hehe when u wrote ur function f i got it u will get your answer!! i was sure of it =D

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