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1- اذا كان 3 لـــو س +4 لـــو ص -لــو س ص^2 =2(لـــو2+لــو3)
اثبت أن س ص =6

2-اذا كان لوج أ +لــوج ب -2لــوج أ+ب /2 = صفر (الجيم تحت لو)

اثبت أن أ=ب

3/حل المعادلة

(لـــو س)^2 +لــوس^2 =(لــو 2)^2 -1 (ناقص واحد لوحدها )







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( لوس)2 + 2 لوس +1 = (لو 2 )2
( لوس + 1 )2 = (لو 2 )2
لوس + 1 =لو2
لوس = لو 2– لو10 = لو(1/5)
س= 1/5
لو س + 1 = - لو2
لوس = - لو 2 – لو10
لوس= - ( لو2 + لو10 ) = - لو 20 = لو (1/20)
س= 1/20

شكراااااااااااااا جدا يا استاذ محمد وجزاك الله كل خير

yaret tektb el mas2la sa7 3shan nastafed kolena

thank you for

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