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Mathematics
If (1/f)=(1/u)+(1/v), then make v as the subject of the formula.
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Q. If $\frac{1}{f}=\frac{1}{u}+\frac{1}{v}$, then make $v$ as the subject of the formula.
Formulae
A
$v=\frac{u-f}{u f}$
B
$v=\frac{f-u}{f u}$
C
$v=\frac{u f}{u-f}$
D
$v=\frac{u f}{u+f}$
Solution:
(i) Apply transposition.
(ii) First make $\frac{1}{v}$ as the subject and then write reciprocal form.