Aprēķins: kvxq0s - 1

1

/ d

+

1

/ f

=

1

/ F

1

/ d

+

1

/ f

=

1

/ F

$\frac{1}{d}+\frac{1}{f}$ = $\frac{1}{F}$

1

/ d

=

1

/ F

-

1

/ f

$\frac{1}{d}$ = $\frac{1}{F}-\frac{1}{f}$

d =

1

/ (

1

/ F

-

1

/ f

)

$d$ = $\frac{1}{\frac{1}{F}-\frac{1}{f}}$