15-qadamdagi sonni toping: 1 → 3 → 5 → 7 → 9
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29
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30
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28
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31
📝 Detailed explanation
Bu arifmetik progressiya bo'lib, birinchi hadi 1 ga, ayirmasi esa 2 ga teng. 15-hadi: 1 + 14 × 2 = 1 + 28 = 29.
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