miqbello03ozca5d
miqbello03ozca5d
13-11-2017
Mathematics
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I need help with this problem it
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Catya
Catya
13-11-2017
[tex] \frac{1}{u} + \frac{1}{v} = \frac{1}{f} \\ \\ \frac{1}{u} = \frac{1}{f} - \frac{1}{v} \\ \\ \frac{1}{u} = \frac{1}{f} ( \frac{v}{v} )- \frac{1}{v} ( \frac{f}{f} ) \\ \\ \frac{1}{u} = \frac{v}{vf} - \frac{f}{vf} \\ \\ \frac{1}{u} = \frac{v - f}{vf} \\ \\ u = \frac{vf}{v-f} [/tex]
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