Uploaded by Omadbek Qosimov

9-sinf

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9-sinf uchun (NY)-1111 (AGA-9495)
1) ava b sonlar
2π‘Ž
π‘Ž+𝑏
+
𝑏
π‘Ž−𝑏
= 2 tenglikni qanoatlantiradi.
3π‘Ž−𝑏
π‘Ž+5𝑏
ifoda
qanday qiymatlarni qabul qilishi mumkin?
2) ⏟
111 … 11 soni 7 ga bo’linadi. Shu son 13 ga ham
π‘π‘–π‘Ÿ π‘›π‘’π‘β„Žπ‘‘π‘Ž π‘π‘–π‘Ÿπ‘™π‘Žπ‘Ÿ
bo’linishiniisbotlang.
3) ABC o’tkirburchakliuchburchakningbalandliklari H
nuqtadakesishadi. Agar AB=CH ekanima’lumbo’lsa,
ACBburchakni toping.
1
4) Uchtanomanfiyπ‘₯1 , π‘₯2 , π‘₯3 sonlarningyig’indisi dankattaemas.
2
1
(1 − π‘₯1 )(1 − π‘₯2 )(1 − π‘₯3 ) ≥ ekaniniisbotlang.
2
5) Aylanabo’ylabyig’indisi 94 gatengbo’lgan n ta butun son
yozilgan. Ixtiyoriy son o’zidan keying
ikkitasonlarayirmasiningmoduligateng.
nnechagatengbo’lishimumkin. ( Barchavariantlarni toping).
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