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nickymarden

  • 3 years ago

help.

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  1. nickymarden
    • 3 years ago
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  2. nickymarden
    • 3 years ago
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    the last equation is supposed to be f'(1)=

  3. nickymarden
    • 3 years ago
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    @amistre64

  4. amistre64
    • 3 years ago
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    after learning the derivative rules; you never go back to the limit definition ...

  5. nickymarden
    • 3 years ago
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    i knoow, but that's what he wants! ;/

  6. amistre64
    • 3 years ago
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    then plug in the (1+h) into the function and algebra it out; its simple enough with that function

  7. amistre64
    • 3 years ago
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    \[\lim\frac{5-2(1+h)-(5-2(1))}{(1+h)-1}\]

  8. rs32623
    • 3 years ago
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    well we have \[f'(1)=\lim_{\Delta x \rightarrow 0}(f(1+\Delta x)-f(1))/\Delta x\] we have f(1+delta x)= 5-(2*(1+delta x)) =3-2*(delta x) & f(1)= 3 put these in above equation we have (3-2*(delta x)-3)/delta x delta x gets cancelled & we have -2 as answer..

  9. nickymarden
    • 3 years ago
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    yeeah, thanks. i got it :))

  10. amistre64
    • 3 years ago
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    good luck ;)

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