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58. Cheksiz kamayuvchi geometrik progressiya — JAYDARIMOCK
Abituriyent 1-11 to'plami
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58. Cheksiz kamayuvchi geometrik progressiya
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1.
O'rtacha
Otaning yoshi uchta farzandi yoshi yig'indisidan 3 marta katta. 4 yildan keyin otaning yoshi farzandlari yoshlari yig'indisidan 2 marta katta bo'lib qoladigan bo'lsa, otaning hozirgi yoshini toping.
A)
54
B)
45
C)
30
D)
60
Javobni tekshirish
Yechim tahlili
Oldingi
Keyingi
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