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If n resistors of unequal resistances are connected in parallel,and the percenrage error in all resistors are k then,total error in parallel combination is?

If n resistors of unequal resistances are connected in parallel,and the percenrage error in all resistors are k then,total error in parallel combination is? Correct Answer \(x \frac{∂z}{∂x}+y \frac{∂z}{∂y}=1-\frac{x^2+y^2}{x+y} e^{\frac{x^2+y^2}{x+y}}\)

Given 1⁄r = 1⁄a + 1⁄b + 1⁄c +⋯.. + 1⁄n Differentiating all, – 1⁄r2 dr = – 1⁄a2 da – 1⁄b2 db – ….- 1⁄n2 dn Now, 1⁄r2 dr = + 1⁄a2 da + 1⁄b2 db + ….+ 1⁄n2 dn Multiplying by 100 and putting da = db = ……. = dn =k.

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