{"book":"adl0258","page":249,"text":"۲۴۴\n\n(۱۱) ا٣/٢ ـ لا + لا٣/٦ (۱۲) ا (و ٢ ا و ب + ٣ ب ج) / ا٢ ب٢\n\n(١٣) ا - ٣ ب / ج + و ٣ ا ب + ٩ ب٢ / ب ج + و ٢ ا - ٢ ب٢ / ا٢ ج\n\n(١۴) ب (ا ـ ب + ج) / ا ج + ٢ (ا ـ ب + ج) / ب ج + ب ا + ج - ٢ ا ب / ا ب ج\n\n(۱۵) (ا ـ ب) / (ب ـ ج) و (ا ـ ج) / (ب ـ ج) و (ج ـ ا) / (ا ـ ب)\n\n۹۵ جمع کسور جبریه\nبحکم نتیجه سوم قضیه هندسه چهل و هشتم\nو (ب + ج + د + ی) = ا ب + ا ج + ا د + ا ی (برای هر قیمت ا و ب و ج و د و ی)\nثه برعکس آن ا ب + ا ج + ا د + ا ی = ب + ج + د + ی / ا\n= ا ب / ا + ا ج / ا + ا د / ا + ا ی / ا\n\nلهذا اگر ط و ق و س و س بجای ا ب و ا ج و ا د و ا ی نوشته شوند\nط + ق + س + س / ا = ط / ا + ق / ا + س / ا + س / ا (برای هر قیمت ط و ق و س و س و ا)\n\nپس مجموع چند کسر جبری که متحد المخرج باشند مساوی آن کسریست که صورت آن\nمساوی مجموع همه صورتهای کسور مذکور و مخرج آن مساوی مخرج کسر مفروضه باشد\nپس برای جمع کسور جبریه اولاً آنها را متحد المخرج بسازید بعد از ان مجموع آنها را بطریق فوق معلوم کنید\nمثال ۱ قیمت ا / ا ـ ب + ب / ب ـ ا را معلوم کنید:-\nچون ب / ب ـ ا = ب × (- ا) / (ب - ا) (- ا) = - ب / ا ـ ب\n∴ ا / ا ـ ب + ب / ب ـ ا = ا / ا ـ ب + - ب / ا ـ ب = ا + (- ب) / ا ـ ب = ا ـ ب / ا ـ ب = ١","chars":1073,"image":"https://storage.googleapis.com/adl-page-images/adl0258/00249.jpg","first_page":1,"last_page":309,"title":"Kitāb-i jabr va muqābalah ‏كتاب جبر و مقابله Silsilah-ʼi Mūʼallifāt-i Madrasah-i Mubārakah-i Ḥabībīyah-ʼi Dār al-Salṭanah-ʼi Kābul","permalink":"https://afghanpress.org/book/adl0258/249","canvas":"https://afghanpress.org/iiif/adl0258/canvas/249","source":"https://afghanistandl.nyu.edu/books/adl0258/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0258_download.pdf","rights":{"image":{"statement":"Public domain. NYU states: \"All works presented on this website are, unless otherwise indicated, in the public domain. The images available on this website may be freely reproduced, distributed and transmitted by anyone for any purpose, commercial or non-commercial.\"","uri":"http://rightsstatements.org/vocab/NoC-US/1.0/","holder":"New York University Libraries","source":"https://afghanistandl.nyu.edu/about.html","delivery":"Images are served from a copy mirrored by this project, not from NYU's servers, under the reproduction terms above.","endorsement":"This is an independent project. It is not affiliated with, endorsed by, or reviewed by New York University."},"text":{"statement":"Machine-generated transcription, dedicated to the public domain under CC0 1.0. No warranty of accuracy: see the provenance block on every page.","uri":"https://creativecommons.org/publicdomain/zero/1.0/","holder":"Steps Ventures"}},"provenance":{"text_produced_by":"gemini-3.1-pro-preview","thinking_level":"low","read_completed":"2026-08-09","per_page_confidence":null,"per_page_confidence_note":"Not recorded during the corpus run. No calibrated per-page score exists, and none is estimated here.","human_reviewed":false,"accuracy_context":"Roughly two thirds of characters agree with a modern printed edition of the same text. Much of the disagreement is editorial, not misreading. Treat the transcription as a finding aid and read the page image before quoting.","primary_source":"The page image. The text is an index into it."}}