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پلانی شاهانە
: ( \frac1f' = \frac1\overlineOA' - \frac1\overlineOA ) ( f' ) = focal length
Formule De Physique Chimie Jun 2026
: ( \frac1f' = \frac1\overlineOA' - \frac1\overlineOA ) ( f' ) = focal length