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anonymous

  • 5 years ago

how do you find the derivative of the function (1/R) = (1/r_1) +(1/r_2) ?

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  1. anonymous
    • 5 years ago
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    I had R^-1 = r_1^-1 +r_2^-1...and then I got lost.

  2. anonymous
    • 5 years ago
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    I've also cross multiplied so that \[1/R = (r_2 + r_1)/(r_1r_2)\]

  3. anonymous
    • 5 years ago
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    But I don't know how to get the derivative of that either.

  4. anonymous
    • 5 years ago
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    What are you trying to take the derivative with respect to?

  5. anonymous
    • 5 years ago
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    t, x,y,z...?

  6. anonymous
    • 5 years ago
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    with respect to R

  7. anonymous
    • 5 years ago
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    I need to show that R is a increasing function of r_1

  8. anonymous
    • 5 years ago
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    r_2 is a constant

  9. anonymous
    • 5 years ago
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    gotcha

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spraguer (Moderator)
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