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التكامل بالكسور الجزئية: Mathematics Tawjihi question with answer

A Tawjihi Mathematics question (التكامل) with the answer and worked steps.

From the Tawjihi question bank: Mathematics · التكامل

أجد التكامل: x2x24dx\int \frac{x^2}{x^2 - 4} dx باستخدام القسمة الطويلة أولاً.

التكامل بالكسور الجزئية

The answer

بالقسمة: x2x24=1+4(x2)(x+2)=1+1x21x+2\frac{x^2}{x^2-4}=1+\frac{4}{(x-2)(x+2)}=1+\frac{1}{x-2}-\frac{1}{x+2}. إذن التكامل x+lnx2lnx+2+C=x+lnx2x+2+Cx+\ln|x-2|-\ln|x+2|+C=x+\ln\left|\frac{x-2}{x+2}\right|+C.

Explanation

هذا يثبت قاعدة: درجة البسط مساوية لدرجة المقام، إذن القسمة أولاً.

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