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Question

If υμ+μυ=6, then dυdμ=

A
17μυμ17υ
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B
μ17υ17μυ
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C
17μ+υμ17υ
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D
μ+17υ17μυ
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Solution

The correct option is B μ17υ17μυ
vμ+μv=6
v+μvμ=6
(v+μ)2=36vμ
v2+μ2+2vμ36vμ=0
v2+μ234vμ=0
2vdvdμ+2μ34(v+μdvdμ)=0
(2v34μ)dvdμ=34v2μ
2(17μv)dvdμ=2(μ17v)
dvdμ=μ17v17μv

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