9-sinflar uchun Matematikadan I tur olimpiada masalalari


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9-10-11-olimp 2020 yozma


2. Tenglamalar sistemasini yeching:

3. Tenglamani yeching:

4. ketma-ketlik uchun va ekanligi ma’lum. ni toping.

5. Agar uchburchakning ikkita tomini 35 sm va 14 sm ga, ular orasidagi burchakning bissektrisasi 12 sm ga teng bo‘lsa, uchburchakning yuzini toping.



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