Partial differentiation question?

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SUMMARY

The coefficient of rigidity \( n \) for a wire is defined by the formula \( n = \frac{AL}{d^4} \). In this discussion, the user successfully calculated the maximum possible error in \( n \) as ±4.25% after considering measurement errors of ±0.25% for length \( L \) and ±1% for diameter \( d \). The user initially struggled with the differentiation process but resolved the issue by including the correct units in their calculations.

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cowboi12345
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The coefficient of rigidity n of a wire of length L and uniform diameter is given by:
n = AL/d^4

where A is a constant...If errors of +- 0.25% and +-1% are possible in measuring L and d respectively, find the maximum possible error in the calculated value of n...

how do i do this.?

I've partially differentiated it with respect to L and d...and that's about it..
 
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ok...nvm...i got it...its +-4.25%...i forgot to include the units of 0.25L and 1d...lol...
 

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